diff --git a/src/packages/cli/package-lock.json b/src/packages/cli/package-lock.json
index 0cab314bfe..32ba85a6f5 100644
--- a/src/packages/cli/package-lock.json
+++ b/src/packages/cli/package-lock.json
@@ -4,6 +4,318 @@
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 	"requires": true,
 	"dependencies": {
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+				"@babel/types": "^7.20.5",
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+				"debug": "^4.1.0",
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+				"semver": "^6.3.0"
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+					"dev": true
+				}
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+			"resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.20.5.tgz",
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+			"dev": true,
+			"requires": {
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+				"jsesc": "^2.5.1"
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+			"dependencies": {
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+					"resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.2.tgz",
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+					"dev": true,
+					"requires": {
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+						"@jridgewell/sourcemap-codec": "^1.4.10",
+						"@jridgewell/trace-mapping": "^0.3.9"
+					}
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+			"dev": true,
+			"requires": {
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+				"@babel/helper-validator-option": "^7.18.6",
+				"browserslist": "^4.21.3",
+				"semver": "^6.3.0"
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+					"dev": true
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+			"dev": true
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+			"requires": {
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+				"@babel/types": "^7.19.0"
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+			"dev": true,
+			"requires": {
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+		"@babel/helper-module-imports": {
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+			"resolved": "https://registry.npmjs.org/@babel/helper-module-imports/-/helper-module-imports-7.18.6.tgz",
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+			"dev": true,
+			"requires": {
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+			}
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+		"@babel/helper-module-transforms": {
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+			"resolved": "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.20.2.tgz",
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+			"dev": true,
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+				"@babel/helper-module-imports": "^7.18.6",
+				"@babel/helper-simple-access": "^7.20.2",
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+			"dev": true
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+		"@babel/helper-validator-option": {
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+			"requires": {
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+				"@babel/parser": "^7.18.10",
+				"@babel/types": "^7.18.10"
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+		"@babel/traverse": {
+			"version": "7.20.5",
+			"resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.20.5.tgz",
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+			"dev": true,
+			"requires": {
+				"@babel/code-frame": "^7.18.6",
+				"@babel/generator": "^7.20.5",
+				"@babel/helper-environment-visitor": "^7.18.9",
+				"@babel/helper-function-name": "^7.19.0",
+				"@babel/helper-hoist-variables": "^7.18.6",
+				"@babel/helper-split-export-declaration": "^7.18.6",
+				"@babel/parser": "^7.20.5",
+				"@babel/types": "^7.20.5",
+				"debug": "^4.1.0",
+				"globals": "^11.1.0"
+			}
+		},
+		"@babel/types": {
+			"version": "7.20.5",
+			"resolved": "https://registry.npmjs.org/@babel/types/-/types-7.20.5.tgz",
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+			"dev": true,
+			"requires": {
+				"@babel/helper-string-parser": "^7.19.4",
+				"@babel/helper-validator-identifier": "^7.19.1",
+				"to-fast-properties": "^2.0.0"
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+		},
 		"@cspotcode/source-map-support": {
 			"version": "0.8.1",
 			"resolved": "https://registry.npmjs.org/@cspotcode/source-map-support/-/source-map-support-0.8.1.tgz",
@@ -11,6 +323,18 @@
 			"dev": true,
 			"requires": {
 				"@jridgewell/trace-mapping": "0.3.9"
+			},
+			"dependencies": {
+				"@jridgewell/trace-mapping": {
+					"version": "0.3.9",
+					"resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.9.tgz",
+					"integrity": "sha512-3Belt6tdc8bPgAtbcmdtNJlirVoTmEb5e2gC94PnkwEW9jI6CAHUeoG85tjWP5WquqfavoMtMwiG4P926ZKKuQ==",
+					"dev": true,
+					"requires": {
+						"@jridgewell/resolve-uri": "^3.0.3",
+						"@jridgewell/sourcemap-codec": "^1.4.10"
+					}
+				}
 			}
 		},
 		"@ethereumjs/rlp": {
@@ -28,12 +352,111 @@
 				"ethereum-cryptography": "^1.1.2"
 			}
 		},
+		"@istanbuljs/load-nyc-config": {
+			"version": "1.1.0",
+			"resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.1.0.tgz",
+			"integrity": "sha512-VjeHSlIzpv/NyD3N0YuHfXOPDIixcA1q2ZV98wsMqcYlPmv2n3Yb2lYP9XMElnaFVXg5A7YLTeLu6V84uQDjmQ==",
+			"dev": true,
+			"requires": {
+				"camelcase": "^5.3.1",
+				"find-up": "^4.1.0",
+				"get-package-type": "^0.1.0",
+				"js-yaml": "^3.13.1",
+				"resolve-from": "^5.0.0"
+			},
+			"dependencies": {
+				"argparse": {
+					"version": "1.0.10",
+					"resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+					"integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+					"dev": true,
+					"requires": {
+						"sprintf-js": "~1.0.2"
+					}
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+				"camelcase": {
+					"version": "5.3.1",
+					"resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
+					"integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
+					"dev": true
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+				"find-up": {
+					"version": "4.1.0",
+					"resolved": "https://registry.npmjs.org/find-up/-/find-up-4.1.0.tgz",
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+			"version": "3.0.2",
+			"resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
+			"integrity": "sha512-JZkJMZkAGFFPP2YqXZXPbMlMBgsxzE8ILs4lMIX/2o0L9UBw9O/Y3o6wFw/i9YLapcUJWwqbi3kdxIPdC62TIA==",
+			"dev": true,
+			"requires": {
+				"glob": "^7.1.3"
+			}
+		},
 		"safe-buffer": {
 			"version": "5.2.1",
 			"resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
@@ -971,6 +2153,15 @@
 			"resolved": "https://registry.npmjs.org/sec/-/sec-1.0.0.tgz",
 			"integrity": "sha512-rVnXtdy9keLxyssT6xung9WwtdB+kha3De93w50RNzwOslyLaDGhqoOqrh4InPoOhhqUZ4JOnovGd3BvLZ+f7A=="
 		},
+		"semver": {
+			"version": "7.3.8",
+			"resolved": "https://registry.npmjs.org/semver/-/semver-7.3.8.tgz",
+			"integrity": "sha512-NB1ctGL5rlHrPJtFDVIVzTyQylMLu9N9VICA6HSFJo8MCGVTMW6gfpicwKmmK/dAjTOrqu5l63JJOpDSrAis3A==",
+			"dev": true,
+			"requires": {
+				"lru-cache": "^6.0.0"
+			}
+		},
 		"serialize-javascript": {
 			"version": "6.0.0",
 			"resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-6.0.0.tgz",
@@ -980,6 +2171,12 @@
 				"randombytes": "^2.1.0"
 			}
 		},
+		"set-blocking": {
+			"version": "2.0.0",
+			"resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
+			"integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==",
+			"dev": true
+		},
 		"shebang-command": {
 			"version": "2.0.0",
 			"resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
@@ -995,6 +2192,43 @@
 			"integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==",
 			"dev": true
 		},
+		"side-channel": {
+			"version": "1.0.4",
+			"resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.0.4.tgz",
+			"integrity": "sha512-q5XPytqFEIKHkGdiMIrY10mvLRvnQh42/+GoBlFW3b2LXLE2xxJpZFdm94we0BaoV3RwJyGqg5wS7epxTv0Zvw==",
+			"dev": true,
+			"requires": {
+				"call-bind": "^1.0.0",
+				"get-intrinsic": "^1.0.2",
+				"object-inspect": "^1.9.0"
+			}
+		},
+		"signal-exit": {
+			"version": "3.0.7",
+			"resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.7.tgz",
+			"integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==",
+			"dev": true
+		},
+		"source-map": {
+			"version": "0.6.1",
+			"resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+			"integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+			"dev": true
+		},
+		"spawn-wrap": {
+			"version": "2.0.0",
+			"resolved": "https://registry.npmjs.org/spawn-wrap/-/spawn-wrap-2.0.0.tgz",
+			"integrity": "sha512-EeajNjfN9zMnULLwhZZQU3GWBoFNkbngTUPfaawT4RkMiviTxcX0qfhVbGey39mfctfDHkWtuecgQ8NJcyQWHg==",
+			"dev": true,
+			"requires": {
+				"foreground-child": "^2.0.0",
+				"is-windows": "^1.0.2",
+				"make-dir": "^3.0.0",
+				"rimraf": "^3.0.0",
+				"signal-exit": "^3.0.2",
+				"which": "^2.0.1"
+			}
+		},
 		"split2": {
 			"version": "2.2.0",
 			"resolved": "https://registry.npmjs.org/split2/-/split2-2.2.0.tgz",
@@ -1003,6 +2237,12 @@
 				"through2": "^2.0.2"
 			}
 		},
+		"sprintf-js": {
+			"version": "1.0.3",
+			"resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
+			"integrity": "sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==",
+			"dev": true
+		},
 		"string-width": {
 			"version": "4.2.3",
 			"resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
@@ -1014,6 +2254,15 @@
 				"strip-ansi": "^6.0.1"
 			}
 		},
+		"string_decoder": {
+			"version": "1.3.0",
+			"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+			"integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+			"dev": true,
+			"requires": {
+				"safe-buffer": "~5.2.0"
+			}
+		},
 		"strip-ansi": {
 			"version": "6.0.1",
 			"resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
@@ -1023,12 +2272,37 @@
 				"ansi-regex": "^5.0.1"
 			}
 		},
+		"strip-bom": {
+			"version": "4.0.0",
+			"resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-4.0.0.tgz",
+			"integrity": "sha512-3xurFv5tEgii33Zi8Jtp55wEIILR9eh34FAW00PZf+JnSsTmV/ioewSgQl97JHvgjoRGwPShsWm+IdrxB35d0w==",
+			"dev": true
+		},
 		"strip-json-comments": {
 			"version": "3.1.1",
 			"resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-3.1.1.tgz",
 			"integrity": "sha512-6fPc+R4ihwqP6N/aIv2f1gMH8lOVtWQHoqC4yK6oSDVVocumAsfCqjkXnqiYMhmMwS/mEHLp7Vehlt3ql6lEig==",
 			"dev": true
 		},
+		"superagent": {
+			"version": "6.1.0",
+			"resolved": "https://registry.npmjs.org/superagent/-/superagent-6.1.0.tgz",
+			"integrity": "sha512-OUDHEssirmplo3F+1HWKUrUjvnQuA+nZI6i/JJBdXb5eq9IyEQwPyPpqND+SSsxf6TygpBEkUjISVRN4/VOpeg==",
+			"dev": true,
+			"requires": {
+				"component-emitter": "^1.3.0",
+				"cookiejar": "^2.1.2",
+				"debug": "^4.1.1",
+				"fast-safe-stringify": "^2.0.7",
+				"form-data": "^3.0.0",
+				"formidable": "^1.2.2",
+				"methods": "^1.1.2",
+				"mime": "^2.4.6",
+				"qs": "^6.9.4",
+				"readable-stream": "^3.6.0",
+				"semver": "^7.3.2"
+			}
+		},
 		"supports-color": {
 			"version": "7.2.0",
 			"resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
@@ -1056,6 +2330,17 @@
 				"sec": "^1.0.0"
 			}
 		},
+		"test-exclude": {
+			"version": "6.0.0",
+			"resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-6.0.0.tgz",
+			"integrity": "sha512-cAGWPIyOHU6zlmg88jwm7VRyXnMN7iV68OGAbYDk/Mh/xC/pzVPlQtY6ngoIH/5/tciuhGfvESU8GrHrcxD56w==",
+			"dev": true,
+			"requires": {
+				"@istanbuljs/schema": "^0.1.2",
+				"glob": "^7.1.4",
+				"minimatch": "^3.0.4"
+			}
+		},
 		"through2": {
 			"version": "2.0.5",
 			"resolved": "https://registry.npmjs.org/through2/-/through2-2.0.5.tgz",
@@ -1094,6 +2379,12 @@
 				}
 			}
 		},
+		"to-fast-properties": {
+			"version": "2.0.0",
+			"resolved": "https://registry.npmjs.org/to-fast-properties/-/to-fast-properties-2.0.0.tgz",
+			"integrity": "sha512-/OaKK0xYrs3DmxRYqL/yDc+FxFUVYhDlXMhRmv3z915w2HF1tnN1omB354j8VUGO/hbRzyD6Y3sA7v7GS/ceog==",
+			"dev": true
+		},
 		"to-regex-range": {
 			"version": "5.0.1",
 			"resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
@@ -1137,17 +2428,42 @@
 			"resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.21.3.tgz",
 			"integrity": "sha512-t0rzBq87m3fVcduHDUFhKmyyX+9eo6WQjZvf51Ea/M0Q7+T374Jp1aUiyUl0GKxp8M/OETVHSDvmkyPgvX+X2w=="
 		},
+		"typedarray-to-buffer": {
+			"version": "3.1.5",
+			"resolved": "https://registry.npmjs.org/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz",
+			"integrity": "sha512-zdu8XMNEDepKKR+XYOXAVPtWui0ly0NtohUscw+UmaHiAWT8hrV1rr//H6V+0DvJ3OQ19S979M0laLfX8rm82Q==",
+			"dev": true,
+			"requires": {
+				"is-typedarray": "^1.0.0"
+			}
+		},
 		"typescript": {
 			"version": "4.7.4",
 			"resolved": "https://registry.npmjs.org/typescript/-/typescript-4.7.4.tgz",
 			"integrity": "sha512-C0WQT0gezHuw6AdY1M2jxUO83Rjf0HP7Sk1DtXj6j1EwkQNZrHAg2XPWlq62oqEhYvONq5pkC2Y9oPljWToLmQ==",
 			"dev": true
 		},
+		"update-browserslist-db": {
+			"version": "1.0.10",
+			"resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.0.10.tgz",
+			"integrity": "sha512-OztqDenkfFkbSG+tRxBeAnCVPckDBcvibKd35yDONx6OU8N7sqgwc7rCbkJ/WcYtVRZ4ba68d6byhC21GFh7sQ==",
+			"dev": true,
+			"requires": {
+				"escalade": "^3.1.1",
+				"picocolors": "^1.0.0"
+			}
+		},
 		"util-deprecate": {
 			"version": "1.0.2",
 			"resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
 			"integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw=="
 		},
+		"uuid": {
+			"version": "8.3.2",
+			"resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
+			"integrity": "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg==",
+			"dev": true
+		},
 		"v8-compile-cache-lib": {
 			"version": "3.0.1",
 			"resolved": "https://registry.npmjs.org/v8-compile-cache-lib/-/v8-compile-cache-lib-3.0.1.tgz",
@@ -1163,6 +2479,12 @@
 				"isexe": "^2.0.0"
 			}
 		},
+		"which-module": {
+			"version": "2.0.0",
+			"resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
+			"integrity": "sha512-B+enWhmw6cjfVC7kS8Pj9pCrKSc5txArRyaYGe088shv/FGWH+0Rjx/xPgtsWfsUtS27FkP697E4DDhgrgoc0Q==",
+			"dev": true
+		},
 		"workerpool": {
 			"version": "6.1.5",
 			"resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.1.5.tgz",
@@ -1186,6 +2508,18 @@
 			"integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
 			"dev": true
 		},
+		"write-file-atomic": {
+			"version": "3.0.3",
+			"resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
+			"integrity": "sha512-AvHcyZ5JnSfq3ioSyjrBkH9yW4m7Ayk8/9My/DD9onKeu/94fwrMocemO2QAJFAlnnDN+ZDS+ZjAR5ua1/PV/Q==",
+			"dev": true,
+			"requires": {
+				"imurmurhash": "^0.1.4",
+				"is-typedarray": "^1.0.0",
+				"signal-exit": "^3.0.2",
+				"typedarray-to-buffer": "^3.1.5"
+			}
+		},
 		"xtend": {
 			"version": "4.0.2",
 			"resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
@@ -1197,6 +2531,12 @@
 			"integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==",
 			"dev": true
 		},
+		"yallist": {
+			"version": "4.0.0",
+			"resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+			"integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
+			"dev": true
+		},
 		"yargs": {
 			"version": "16.2.0",
 			"resolved": "https://registry.npmjs.org/yargs/-/yargs-16.2.0.tgz",
diff --git a/src/packages/cli/package.json b/src/packages/cli/package.json
index ff901c2c96..e9a3e45808 100644
--- a/src/packages/cli/package.json
+++ b/src/packages/cli/package.json
@@ -30,7 +30,7 @@
   },
   "scripts": {
     "tsc": "tsc --build",
-    "test": "nyc npm run mocha",
+    "test": "nyc --reporter lcov npm run mocha",
     "mocha": "cross-env TS_NODE_FILES=true mocha --exit --check-leaks --throw-deprecation --trace-warnings --require ts-node/register 'tests/**/*.test.ts'",
     "start": "cross-env node --require ts-node/register --inspect src/cli.ts"
   },
@@ -59,7 +59,9 @@
     "cross-env": "7.0.3",
     "mocha": "9.1.3",
     "ts-node": "10.9.1",
-    "typescript": "4.7.4"
+    "typescript": "4.7.4",
+    "superagent": "6.1.0",
+    "nyc": "15.1.0"
   },
   "dependencies": {
     "@ethereumjs/util": "8.0.2",
diff --git a/src/packages/cli/src/args.ts b/src/packages/cli/src/args.ts
index 5899d980c0..a36fae8690 100644
--- a/src/packages/cli/src/args.ts
+++ b/src/packages/cli/src/args.ts
@@ -1,5 +1,10 @@
+// `import Yargs from "yargs"` is the Yargs singleton and namespace
+// `import yargs from "yargs/yargs"` is the non-singleton interface
+// See https://github.com/yargs/yargs/issues/1648
+import Yargs, { Options } from "yargs";
+import yargs from "yargs/yargs";
+
 import { TruffleColors } from "@ganache/colors";
-import yargs, { Options } from "yargs";
 import {
   DefaultFlavor,
   FilecoinFlavorName,
@@ -26,7 +31,7 @@ marked.setOptions({
   })
 });
 
-const wrapWidth = Math.min(120, yargs.terminalWidth());
+const wrapWidth = Math.min(120, Yargs.terminalWidth());
 const NEED_HELP = "Need more help? Reach out to the Truffle community at";
 const COMMUNITY_LINK = "https://trfl.io/support";
 
@@ -43,7 +48,7 @@ const highlight = (t: string) => unescapeEntities(marked.parseInline(t));
 const center = (str: string) =>
   " ".repeat(Math.max(0, Math.floor((wrapWidth - str.length) / 2))) + str;
 
-const addAliases = (args: yargs.Argv<{}>, aliases: string[], key: string) => {
+const addAliases = (args: Yargs.Argv<{}>, aliases: string[], key: string) => {
   const options = { hidden: true, alias: key };
   return aliases.reduce((args, a) => args.option(a, options), args);
 };
@@ -54,7 +59,7 @@ function processOption(
   group: string,
   option: string,
   optionObj: Definitions<Base.Config>[string],
-  argv: yargs.Argv,
+  argv: Yargs.Argv,
   flavor: string
 ) {
   if (optionObj.disableInCLI !== true) {
@@ -122,7 +127,7 @@ function applyDefaults(
   flavorDefaults:
     | typeof DefaultOptionsByName[keyof typeof DefaultOptionsByName]
     | typeof _DefaultServerOptions,
-  flavorArgs: yargs.Argv<{}>,
+  flavorArgs: Yargs.Argv<{}>,
   flavor: keyof typeof DefaultOptionsByName
 ) {
   for (const category in flavorDefaults) {
@@ -160,8 +165,9 @@ export default function (
 
   // disable dot-notation because yargs just can't coerce args properly...
   // ...on purpose! https://github.com/yargs/yargs/issues/1021#issuecomment-352324693
-  yargs
+  const yargsParser = yargs()
     .parserConfiguration({ "dot-notation": false })
+    .exitProcess(false)
     .strict()
     .usage(versionUsageOutputText)
     .epilogue(
@@ -188,12 +194,9 @@ export default function (
         command = ["$0", flavor];
         defaultPort = 8545;
         break;
-      default:
-        command = flavor;
-        defaultPort = 8545;
     }
 
-    yargs.command(
+    yargsParser.command(
       command,
       chalk`Use the {bold ${flavor}} flavor of Ganache`,
       flavorArgs => {
@@ -214,14 +217,19 @@ export default function (
             description: chalk`Port to listen on.${EOL}{dim deprecated aliases: --port}${EOL}`,
             alias: ["p", "port"],
             type: "number",
-            default: defaultPort
+            default: defaultPort,
+            // `string: true` to allow raw value to be used in validation below
+            // (otherwise string values becomes NaN)
+            string: true,
+            coerce: port => (isFinite(port) ? +port : port)
           })
           .check(argv => {
             const { "server.port": port, "server.host": host } = argv;
-            if (port < 1 || port > 65535) {
-              throw new Error(`Invalid port number '${port}'`);
+            if (!isFinite(port) || port < 1 || port > 65535) {
+              throw new Error(
+                `Port should be >= 0 and < 65536. Received ${port}.`
+              );
             }
-
             if (host.trim() === "") {
               throw new Error("Cannot leave host blank; please provide a host");
             }
@@ -244,7 +252,7 @@ export default function (
     );
   }
 
-  yargs
+  yargsParser
     .command(
       "instances",
       highlight(
@@ -272,6 +280,14 @@ export default function (
               stopArgs.action = "stop";
             }
           )
+          .check(instancesArgs => {
+            if (instancesArgs["_"].length <= 1) {
+              throw new Error(
+                "No sub-command given. See `ganache instances --help` for more information."
+              );
+            }
+            return true;
+          })
           .version(false);
       }
     )
@@ -280,7 +296,7 @@ export default function (
     .wrap(wrapWidth)
     .version(version);
 
-  const parsedArgs = yargs.parse(rawArgs);
+  const parsedArgs = yargsParser.parse(rawArgs);
 
   let finalArgs: GanacheArgs;
   if (parsedArgs.action === "stop") {
@@ -308,7 +324,7 @@ export default function (
       >)
     };
   } else {
-    throw new Error(`Unknown action: ${parsedArgs.action}`);
+    finalArgs = { action: "none" };
   }
 
   return finalArgs;
diff --git a/src/packages/cli/src/cli.ts b/src/packages/cli/src/cli.ts
index bcb9a17e74..830397a6bb 100644
--- a/src/packages/cli/src/cli.ts
+++ b/src/packages/cli/src/cli.ts
@@ -18,6 +18,7 @@ import {
 import { TruffleColors } from "@ganache/colors";
 import Table from "cli-table";
 import chalk from "chalk";
+import { GanacheArgs } from "./types";
 
 const porscheColor = chalk.hex(TruffleColors.porsche);
 
@@ -49,181 +50,189 @@ const detailedVersion = `ganache v${version} (@ganache/cli: ${cliVersion}, @gana
 const isDocker =
   "DOCKER" in process.env && process.env.DOCKER.toLowerCase() === "true";
 
-const argv = args(detailedVersion, isDocker);
-if (argv.action === "start") {
-  const flavor = argv.flavor;
-  const cliSettings = argv.server;
+let argv: GanacheArgs;
+try {
+  argv = args(detailedVersion, isDocker);
+} catch (err: any) {
+  // yargs has already output the error message, so we don't need to do anything here
+}
 
-  console.log(detailedVersion);
+if (argv !== undefined) {
+  if (argv.action === "start") {
+    const flavor = argv.flavor;
+    const cliSettings = argv.server;
 
-  let server: ReturnType<typeof Ganache.server>;
-  try {
-    server = Ganache.server(argv);
-  } catch (error: any) {
-    console.error(error.message);
-    process.exit(1);
-  }
+    console.log(detailedVersion);
 
-  let started = false;
-  process.on("uncaughtException", function (e) {
-    if (started) {
-      logAndForceExit([e], 1);
-    } else {
-      logAndForceExit([e.stack], 1);
-    }
-  });
-
-  let receivedShutdownSignal: boolean = false;
-  const handleSignal = async (signal: NodeJS.Signals) => {
-    console.log(`\nReceived shutdown signal: ${signal}`);
-    closeHandler();
-  };
-  const closeHandler = async () => {
+    let server: ReturnType<typeof Ganache.server>;
     try {
-      // graceful shutdown
-      switch (server.status) {
-        case ServerStatus.opening:
-          receivedShutdownSignal = true;
-          console.log("Server is currently starting; waiting…");
-          return;
-        case ServerStatus.open:
-          console.log("Shutting down…");
-          await server.close();
-          console.log("Server has been shut down");
-          break;
-      }
-      // don't just call `process.exit()` here, as we don't want to hide shutdown
-      // errors behind a forced shutdown. Note: `process.exitCode` doesn't do
-      // anything other than act as a place to anchor this comment :-)
-      process.exitCode = 0;
-    } catch (err: any) {
-      logAndForceExit(
-        [
-          "\nReceived an error while attempting to shut down the server: ",
-          err.stack || err
-        ],
-        1
-      );
+      server = Ganache.server(argv);
+    } catch (error: any) {
+      console.error(error.message);
+      process.exit(1);
     }
-  };
-
-  // See http://stackoverflow.com/questions/10021373/what-is-the-windows-equivalent-of-process-onsigint-in-node-js
-  if (process.platform === "win32") {
-    const rl = (require("readline") as typeof Readline)
-      .createInterface({
-        input: process.stdin,
-        output: process.stdout
-      })
-      .on("SIGINT", () => {
-        // we must "close" the RL interface otherwise the process will think we
-        // are still listening
-        // https://nodejs.org/api/readline.html#readline_event_sigint
-        rl.close();
-        handleSignal("SIGINT");
-      });
-  }
 
-  process.on("SIGINT", handleSignal);
-  process.on("SIGTERM", handleSignal);
-  process.on("SIGHUP", handleSignal);
-
-  console.log("Starting RPC server");
-  server.listen(cliSettings.port, cliSettings.host, async (err: Error) => {
-    if (err) {
-      console.error(err);
-      process.exitCode = 1;
-      return;
-    } else if (receivedShutdownSignal) {
+    let started = false;
+    process.on("uncaughtException", function (e) {
+      if (started) {
+        logAndForceExit([e], 1);
+      } else {
+        logAndForceExit([e.stack], 1);
+      }
+    });
+
+    let receivedShutdownSignal: boolean = false;
+    const handleSignal = async (signal: NodeJS.Signals) => {
+      console.log(`\nReceived shutdown signal: ${signal}`);
       closeHandler();
-      return;
-    }
-    started = true;
-    switch (flavor) {
-      case FilecoinFlavorName: {
-        await initializeFilecoin(
-          server.provider as FilecoinProvider,
-          cliSettings
+    };
+    const closeHandler = async () => {
+      try {
+        // graceful shutdown
+        switch (server.status) {
+          case ServerStatus.opening:
+            receivedShutdownSignal = true;
+            console.log("Server is currently starting; waiting…");
+            return;
+          case ServerStatus.open:
+            console.log("Shutting down…");
+            await server.close();
+            console.log("Server has been shut down");
+            break;
+        }
+        // don't just call `process.exit()` here, as we don't want to hide shutdown
+        // errors behind a forced shutdown. Note: `process.exitCode` doesn't do
+        // anything other than act as a place to anchor this comment :-)
+        process.exitCode = 0;
+      } catch (err: any) {
+        logAndForceExit(
+          [
+            "\nReceived an error while attempting to shut down the server: ",
+            err.stack || err
+          ],
+          1
         );
-        break;
-      }
-      case EthereumFlavorName:
-      default: {
-        initializeEthereum(server.provider as EthereumProvider, cliSettings);
-        break;
       }
+    };
+
+    // See http://stackoverflow.com/questions/10021373/what-is-the-windows-equivalent-of-process-onsigint-in-node-js
+    if (process.platform === "win32") {
+      const rl = (require("readline") as typeof Readline)
+        .createInterface({
+          input: process.stdin,
+          output: process.stdout
+        })
+        .on("SIGINT", () => {
+          // we must "close" the RL interface otherwise the process will think we
+          // are still listening
+          // https://nodejs.org/api/readline.html#readline_event_sigint
+          rl.close();
+          handleSignal("SIGINT");
+        });
     }
 
-    // if process.send is defined, this is a child_process (we assume a detached
-    // instance), so we need to notify that we are ready.
-    const isDetachedInstance = process.send !== undefined;
-    if (isDetachedInstance) {
-      notifyDetachedInstanceReady();
-    }
-  });
-} else if (argv.action === "stop") {
-  const instanceName = argv.name;
-
-  stopDetachedInstance(instanceName).then(instanceFound => {
-    if (instanceFound) {
-      console.log("Instance stopped");
-    } else {
-      console.error("Instance not found");
-    }
-  });
-} else if (argv.action === "start-detached") {
-  startDetachedInstance(process.argv, argv, version)
-    .then(instance => {
-      const highlightedName = porscheColor(instance.name);
-      // output only the instance name to allow users to capture stdout and use to
-      // programmatically stop the instance
-      console.log(highlightedName);
-    })
-    .catch(err => {
-      // the child process would have output its error to stdout, so no need to
-      // output anything more
-    });
-} else if (argv.action === "list") {
-  getDetachedInstances().then(instances => {
-    if (instances.length === 0) {
-      console.log(
-        `No detached instances found - try ${porscheColor(
-          "ganache --detach"
-        )} to start a detached instance`
-      );
-    } else {
-      const now = Date.now();
-
-      const table = new Table({
-        head: [
-          chalk.bold("PID"),
-          chalk.bold("Name"),
-          chalk.bold("Flavor"),
-          chalk.bold("Version"),
-          chalk.bold("Host"),
-          chalk.bold("Uptime")
-        ],
-        colAligns: ["right", "left", "left", "left", "left", "right"],
-        style: {
-          head: ["white", "white", "white", "white", "white", "white"]
+    process.on("SIGINT", handleSignal);
+    process.on("SIGTERM", handleSignal);
+    process.on("SIGHUP", handleSignal);
+
+    console.log("Starting RPC server");
+    server.listen(cliSettings.port, cliSettings.host, async (err: Error) => {
+      if (err) {
+        console.error(err);
+        process.exitCode = 1;
+        return;
+      } else if (receivedShutdownSignal) {
+        closeHandler();
+        return;
+      }
+      started = true;
+      switch (flavor) {
+        case FilecoinFlavorName: {
+          await initializeFilecoin(
+            server.provider as FilecoinProvider,
+            cliSettings
+          );
+          break;
         }
-      });
+        case EthereumFlavorName:
+        default: {
+          initializeEthereum(server.provider as EthereumProvider, cliSettings);
+          break;
+        }
+      }
 
-      instances.sort((a, b) => b.startTime - a.startTime);
-      for (let i = 0; i < instances.length; i++) {
-        const instance = instances[i];
-
-        const uptime = now - instance.startTime;
-        table.push([
-          instance.pid.toString(),
-          porscheColor(instance.name),
-          instance.flavor,
-          instance.version,
-          `${instance.host}:${instance.port.toString()}`,
-          formatUptime(uptime)
-        ]);
+      // if process.send is defined, this is a child_process (we assume a detached
+      // instance), so we need to notify that we are ready.
+      const isDetachedInstance = process.send !== undefined;
+      if (isDetachedInstance) {
+        notifyDetachedInstanceReady();
+      }
+    });
+  } else if (argv.action === "stop") {
+    const instanceName = argv.name;
+
+    stopDetachedInstance(instanceName).then(instanceFound => {
+      if (instanceFound) {
+        console.log("Instance stopped");
+      } else {
+        console.error("Instance not found");
       }
+    });
+  } else if (argv.action === "start-detached") {
+    startDetachedInstance(process.argv, argv, version)
+      .then(instance => {
+        const highlightedName = porscheColor(instance.name);
+        // output only the instance name to allow users to capture stdout and use to
+        // programmatically stop the instance
+        console.log(highlightedName);
+      })
+      .catch(err => {
+        // the child process would have output its error to stdout, so no need to
+        // output anything more
+      });
+  } else if (argv.action === "list") {
+    getDetachedInstances().then(instances => {
+      if (instances.length === 0) {
+        console.log(
+          `No detached instances found - try ${porscheColor(
+            "ganache --detach"
+          )} to start a detached instance`
+        );
+      } else {
+        const now = Date.now();
+
+        const table = new Table({
+          head: [
+            chalk.bold("PID"),
+            chalk.bold("Name"),
+            chalk.bold("Flavor"),
+            chalk.bold("Version"),
+            chalk.bold("Host"),
+            chalk.bold("Uptime")
+          ],
+          colAligns: ["right", "left", "left", "left", "left", "right"],
+          style: {
+            head: ["white", "white", "white", "white", "white", "white"]
+          }
+        });
+
+        instances.sort((a, b) => b.startTime - a.startTime);
+        for (let i = 0; i < instances.length; i++) {
+          const instance = instances[i];
+
+          const uptime = now - instance.startTime;
+          table.push([
+            instance.pid.toString(),
+            porscheColor(instance.name),
+            instance.flavor,
+            instance.version,
+            `${instance.host}:${instance.port.toString()}`,
+            formatUptime(uptime)
+          ]);
+        }
 
-      console.log(table.toString());
-    }
-  });
+        console.log(table.toString());
+      }
+    });
+  }
 }
diff --git a/src/packages/cli/src/detach.ts b/src/packages/cli/src/detach.ts
index 02c3904dc1..4dadeb9be6 100644
--- a/src/packages/cli/src/detach.ts
+++ b/src/packages/cli/src/detach.ts
@@ -95,7 +95,8 @@ export async function startDetachedInstance(
     flavor?: FlavorName;
     server: { host: string; port: number };
   },
-  version: string
+  version: string,
+  execArgv: string[] = process.execArgv
 ): Promise<DetachedInstance> {
   const [bin, module, ...args] = argv;
 
@@ -105,6 +106,7 @@ export async function startDetachedInstance(
   const childArgs = [...args, "--no-detach"];
 
   const child = fork(module, childArgs, {
+    execArgv,
     stdio: ["ignore", "ignore", "pipe", "ipc"],
     detached: true
   });
@@ -147,10 +149,11 @@ export async function startDetachedInstance(
 
   const flavor = instanceInfo.flavor;
   const { host, port } = instanceInfo.server;
+
   const cmd =
     process.platform === "win32"
       ? path.basename(process.execPath)
-      : [process.execPath, ...process.execArgv, module, ...childArgs].join(" ");
+      : [process.execPath, ...execArgv, module, ...childArgs].join(" ");
   const pid = child.pid;
   const startTime = Date.now();
 
diff --git a/src/packages/cli/src/process-name.ts b/src/packages/cli/src/process-name.ts
index 0c8dd6f4c1..11f98ed142 100644
--- a/src/packages/cli/src/process-name.ts
+++ b/src/packages/cli/src/process-name.ts
@@ -1,20 +1,23 @@
-function pick(source: string[]) {
-  const partIndex = Math.floor(Math.random() * source.length);
+function pick(source: string[], random: () => number) {
+  const partIndex = Math.floor(random() * source.length);
   return source[partIndex];
 }
 /**
  * Generates a random name to assign to an instance of Ganache. The name is
  * generated from an adjective, a flavor and a type of desert, in the form of
- * `<adjective>_<flavor>_<type>`, eg., `salted_caramel_ganache`.
+ * `<adjective>_<flavor>_<kind>`, eg., `salted_caramel_ganache`.
  */
-export default function createInstanceName() {
-  const name = `${pick(adjectives)}_${pick(flavors)}_${pick(kinds)}`;
-  return name;
+export default function createInstanceName(random: () => number = Math.random) {
+  return `${pick(adjectives, random)}_${pick(flavors, random)}_${pick(
+    kinds,
+    random
+  )}`;
 }
 
 const adjectives = [
   "baked",
   "candied",
+  "creamy",
   "deepfried",
   "frozen",
   "hot",
diff --git a/src/packages/cli/src/types.ts b/src/packages/cli/src/types.ts
index 1cb603e559..d6ad328a73 100644
--- a/src/packages/cli/src/types.ts
+++ b/src/packages/cli/src/types.ts
@@ -6,7 +6,7 @@ type CliServerOptions = {
   port: number;
 };
 
-type Action = "start" | "start-detached" | "list" | "stop";
+type Action = "start" | "start-detached" | "list" | "stop" | "none";
 
 type AbstractArgs<TAction = Action> = {
   action: TAction;
@@ -21,6 +21,7 @@ export type StartArgs<TFlavorName extends FlavorName> =
 export type GanacheArgs =
   | (AbstractArgs<"stop"> & { name: string })
   | AbstractArgs<"list">
+  | AbstractArgs<"none">
   | StartArgs<FlavorName>;
 
 export type CliSettings = CliServerOptions;
diff --git a/src/packages/cli/tests/args.test.ts b/src/packages/cli/tests/args.test.ts
index 870bbe4bbf..cdcf11c18e 100644
--- a/src/packages/cli/tests/args.test.ts
+++ b/src/packages/cli/tests/args.test.ts
@@ -38,7 +38,7 @@ describe("args", () => {
       });
     });
 
-    it("should remove arguments who are kebab-cased", () => {
+    it("should remove arguments which are kebab-cased", () => {
       const input = {
         "namespace.name": "value",
         "namespace.kebab-case": "value",
@@ -54,6 +54,133 @@ describe("args", () => {
   });
 
   describe("parse args", () => {
+    const versionString = "Version string";
+    const isDocker = false;
+
+    describe("help", () => {
+      it("should accept a help parameter", () => {
+        const rawArgs = ["--help"];
+        const options = args(versionString, isDocker, rawArgs);
+
+        assert.deepStrictEqual(options, { action: "none" });
+      });
+    });
+
+    describe("flavor", () => {
+      it("should default to ethereum", () => {
+        const options = args(versionString, isDocker, []);
+
+        assert.strictEqual(options.action, "start");
+        // We check the value of `options.action` here in order to narrow the
+        // type of options. The negative case fails in the assert above.
+        if (options.action === "start") {
+          assert.strictEqual(options.flavor, "ethereum");
+        }
+      });
+
+      it("should accept a flavor of ethereum", () => {
+        const options = args(versionString, isDocker, ["ethereum"]);
+
+        assert.strictEqual(options.action, "start");
+        // We check the value of `options.action` here in order to narrow the
+        // type of options. The negative case fails in the assert above.
+        if (options.action === "start") {
+          assert.strictEqual(options.flavor, "ethereum");
+        }
+      });
+
+      it("should accept a flavor of filecoin", () => {
+        const options = args(versionString, isDocker, ["filecoin"]);
+
+        assert.strictEqual(options.action, "start");
+        // We check the value of `options.action` here in order to narrow the
+        // type of options. The negative case fails in the assert above.
+        if (options.action === "start") {
+          assert.strictEqual(options.flavor, "filecoin");
+        }
+      });
+
+      it("should reject a non-standard flavor", () => {
+        assert.throws(() => args(versionString, isDocker, ["not-a-flavor"]), {
+          name: "YError",
+          message: "Unknown argument: not-a-flavor"
+        });
+      });
+    });
+
+    describe("host and port", () => {
+      it("should default configuration to 127.0.0.1:8545", () => {
+        const options = args(versionString, isDocker, []);
+
+        assert.strictEqual(options.action, "start");
+        // We check the value of `options.action` here in order to narrow the
+        // type of options. The negative case fails in the assert above.
+        if (options.action === "start") {
+          assert.strictEqual(options.server.host, "127.0.0.1");
+          assert.strictEqual(options.server.port, 8545);
+        }
+      });
+
+      it("should default configuration to 0.0.0.0:8545 if running within docker", () => {
+        const options = args(versionString, true, []);
+
+        assert.strictEqual(options.action, "start");
+        // We check the value of `options.action` here in order to narrow the
+        // type of options. The negative case fails in the assert above.
+        if (options.action === "start") {
+          assert.strictEqual(options.server.host, "0.0.0.0");
+          assert.strictEqual(options.server.port, 8545);
+        }
+      });
+
+      it("should parse the provided host configuration", () => {
+        const options = args(versionString, true, ["--host", "localhost"]);
+
+        assert.strictEqual(options.action, "start");
+        // We check the value of `options.action` here in order to narrow the
+        // type of options. The negative case fails in the assert above
+        if (options.action === "start") {
+          assert.strictEqual(options.server.host, "localhost");
+          assert.strictEqual(options.server.port, 8545);
+        }
+      });
+
+      it("should parse the provided port configuration", () => {
+        const options = args(versionString, isDocker, ["--port", "1234"]);
+
+        assert.strictEqual(options.action, "start");
+        // We check the value of `options.action` here in order to narrow the
+        // type of options. The negative case fails in the assert above
+        if (options.action === "start") {
+          assert.strictEqual(options.server.host, "127.0.0.1");
+          assert.strictEqual(options.server.port, 1234);
+        }
+      });
+
+      it("should reject invalid host argument", () => {
+        const invalidHost = "";
+        const rawArgs = ["--host", invalidHost];
+
+        assert.throws(
+          () => args(versionString, isDocker, rawArgs),
+          new Error("Cannot leave host blank; please provide a host")
+        );
+      });
+
+      it("should reject invalid port argument", () => {
+        const invalidPorts = ["0", "-1", "65536", "absolutely-not-a-port"];
+        for (const port of invalidPorts) {
+          const rawArgs = ["--port", port];
+
+          assert.throws(
+            () => args(versionString, isDocker, rawArgs),
+            new Error(`Port should be >= 0 and < 65536. Received ${port}.`),
+            `Expected to throw with supplied port of '${port}'`
+          );
+        }
+      });
+    });
+
     describe("detach", () => {
       const versionString = "Version string";
       const isDocker = false;
@@ -120,5 +247,94 @@ describe("args", () => {
         assert.strictEqual(options.action, "start");
       });
     });
+
+    describe("instances", () => {
+      it("should fail when no sub-command is specified", () => {
+        const rawArgs = ["instances"];
+        assert.throws(() => args(versionString, false, rawArgs), {
+          name: "Error",
+          message:
+            "No sub-command given. See `ganache instances --help` for more information."
+        });
+      });
+
+      it("should fail when invalid sub-command is specified", () => {
+        const rawArgs = ["instances", "invalid-command"];
+        assert.throws(() => args(versionString, false, rawArgs), {
+          name: "YError",
+          message: "Unknown argument: invalid-command"
+        });
+      });
+
+      describe("list", () => {
+        it("should parse the `list` sub command", () => {
+          const rawArgs = ["instances", "list"];
+          const options = args(versionString, isDocker, rawArgs);
+          assert.strictEqual(
+            options.action,
+            "list",
+            "Expected action to be 'list' when 'list' sub-command is specified"
+          );
+        });
+
+        it("should not accept options", () => {
+          const invalidOptions = ["detach", "port", "host", "chain.blockTime"];
+
+          for (let option of invalidOptions) {
+            const rawArgs = ["instances", "list", `--${option}`];
+
+            assert.throws(
+              () => args(versionString, isDocker, rawArgs),
+              {
+                name: "YError",
+                message: `Unknown argument: ${option}`
+              },
+              `Expected to throw with arguments of '${JSON.stringify(rawArgs)}'`
+            );
+          }
+        });
+
+        it("should not accept an additional command", () => {
+          const rawArgs = ["instances", "list", `additional-command`];
+
+          assert.throws(
+            () => args(versionString, isDocker, rawArgs),
+            {
+              name: "YError",
+              message: "Unknown argument: additional-command"
+            },
+            `Expected to throw with arguments of '${JSON.stringify(rawArgs)}'`
+          );
+        });
+      });
+
+      describe("stop", () => {
+        it("should fail if no instance name is supplied", () => {
+          const rawArgs = ["instances", "stop"];
+          assert.throws(() => args(versionString, isDocker, rawArgs));
+        });
+
+        it("should parse the `stop` sub command", () => {
+          const rawArgs = ["instances", "stop", "instance-name"];
+          const options = args(versionString, isDocker, rawArgs);
+
+          assert.strictEqual(
+            options.action,
+            "stop",
+            "Expected action to be 'list' when 'list' sub-command is specified"
+          );
+
+          // We check the value of `options.action` here in order to narrow the
+          // type of options. The negative case fails in the assert above
+          if (options.action === "stop") {
+            assert.strictEqual(
+              options.name,
+              "instance-name",
+              "Instance name should have been the specified argument"
+            );
+          }
+        });
+      });
+    });
   });
 });
diff --git a/src/packages/cli/tests/detach.test.ts b/src/packages/cli/tests/detach.test.ts
index e7507387f3..f88a124737 100644
--- a/src/packages/cli/tests/detach.test.ts
+++ b/src/packages/cli/tests/detach.test.ts
@@ -1,5 +1,63 @@
 import assert from "assert";
-import { formatUptime } from "../src/detach";
+import { basename, join } from "path";
+import {
+  DetachedInstance,
+  formatUptime,
+  getDetachedInstances,
+  startDetachedInstance,
+  stopDetachedInstance
+} from "../src/detach";
+import request from "superagent";
+import { FlavorName } from "@ganache/flavors";
+import envPaths from "env-paths";
+import { readdir, rmdir, mkdir, writeFile } from "fs/promises";
+import psList from "@trufflesuite/ps-list";
+
+const dataPath = envPaths(`Ganache/instances`, { suffix: "" }).data;
+
+async function removeInstancesDirectory() {
+  try {
+    await rmdir(dataPath);
+  } catch (err) {
+    if ((err as NodeJS.ErrnoException).code !== "ENOENT") {
+      throw new Error(
+        `Couldn't remove the instances folder\n${dataPath}\n Check that no instances are running`
+      );
+    }
+  }
+}
+
+async function createInstanceFiles(
+  files: { name: string; contents: string }[]
+) {
+  try {
+    await mkdir(dataPath, { recursive: true });
+  } catch (err) {
+    if ((err as NodeJS.ErrnoException).code !== "EEXIST") {
+      throw new Error(`Couldn't create the instances folder\n${dataPath}`);
+    }
+  }
+
+  const writingFiles = files.map(async file => {
+    const filePath = join(dataPath, file.name);
+    await writeFile(filePath, file.contents);
+  });
+
+  await Promise.all(writingFiles);
+}
+
+const jsonRpc = {
+  jsonrpc: "2.0",
+  id: "1"
+};
+
+const instanceInfo = {
+  flavor: "ethereum" as FlavorName,
+  server: {
+    host: "127.0.0.1",
+    port: 8544
+  }
+};
 
 describe("@ganache/cli", () => {
   describe("detach", () => {
@@ -30,5 +88,259 @@ describe("@ganache/cli", () => {
         });
       });
     });
+
+    describe("stopDetachedInstance()", () => {
+      // successfully stopping an instance is covered in startDetachedInstance() below
+      it("should fail to stop an instance that doesn't exist", async () => {
+        const result = await stopDetachedInstance("burnt_potato_quiche");
+        assert.strictEqual(result, false);
+      });
+    });
+
+    describe("getDetachedInstances()", () => {
+      beforeEach(removeInstancesDirectory);
+
+      it("should return an empty array, when the directory does not exist", async () => {
+        const instances = await getDetachedInstances();
+
+        assert.deepStrictEqual(instances, []);
+      });
+
+      it("should remove invalid instance files", async () => {
+        const cmd =
+          process.platform === "win32"
+            ? basename(process.execPath)
+            : [
+                process.execPath,
+                ...process.execArgv,
+                ...process.argv.slice(1)
+              ].join(" ");
+
+        const instanceInfo = {
+          name: "instance_name",
+          pid: process.pid, // the current process because it _definitely_ exists
+          startTime: Date.now(),
+          host: "127.0.0.1",
+          port: 8545,
+          flavor: "ethereum",
+          cmd, // the current process because it _definitely_ exists
+          version: "DEV"
+        };
+        await createInstanceFiles([
+          {
+            name: "no_json_extension.txt",
+            contents: JSON.stringify(instanceInfo)
+          },
+          {
+            name: "probably_mismatched_pid.json",
+            contents: JSON.stringify({ ...instanceInfo, pid: 1234 })
+          },
+          {
+            name: "mismatched_cmd.json",
+            contents: JSON.stringify({ ...instanceInfo, cmd: "not the cmd" })
+          },
+          {
+            name: "not_really_json.json",
+            contents: "this isn't really JSON"
+          }
+        ]);
+
+        const instances = await getDetachedInstances();
+
+        assert.deepStrictEqual(
+          instances,
+          [],
+          "Expected there to be no instances found"
+        );
+
+        const instanceFiles = await readdir(dataPath);
+        assert.strictEqual(
+          instanceFiles.length,
+          0,
+          "Expected there to be no entries left in the data path"
+        );
+      });
+    });
+
+    describe("startDetachedInstance()", () => {
+      it("rejects when the underlying ganache instance exits", async () => {
+        const startingInstance = startDetachedInstance(
+          [
+            "_",
+            join(__dirname, "../", "src", "cli.ts"),
+            "not",
+            "valid",
+            "args"
+          ],
+          instanceInfo,
+          "DEV",
+          ["--require", "ts-node/register"]
+        );
+
+        await assert.rejects(
+          startingInstance,
+          new Error(
+            "An error occurred spawning a detached instance of Ganache:\nThe detached instance exited with error code: 0"
+          ),
+          "Expected the instance to reject"
+        );
+      }).timeout(30000);
+    });
+
+    // these tests aren't the best (in that they have a wide scope), but they
+    // are that way because starting and stopping an instance is very slow. In
+    // order to avoid blowing out the run time, we only start and stop once.
+    describe("with a detached instance running", () => {
+      const args = [
+        "--detach",
+        "--port",
+        `${instanceInfo.server.port}`,
+        "--chain.chainId",
+        "1234"
+      ];
+      let runningInstance: DetachedInstance;
+      let beforeStartTime: number;
+
+      before(async function () {
+        // set timeout here, because the long running piece is in the before() hook
+        this.timeout(30000);
+
+        // remove the instances folder (but only if it's empty), to ensure that we create it properly
+        await removeInstancesDirectory();
+
+        beforeStartTime = Date.now();
+        const startingInstance = startDetachedInstance(
+          ["_", join(__dirname, "../", "src", "cli.ts"), ...args],
+          instanceInfo,
+          "DEV",
+          ["--require", "ts-node/register"]
+        );
+        await assert.doesNotReject(async () => {
+          runningInstance = await startingInstance;
+        }, "Failed to start detached instance");
+      });
+
+      after(async () => {
+        try {
+          assert.strictEqual(
+            await stopDetachedInstance(runningInstance.name),
+            true,
+            "call to stopDetachedInstance() returned false"
+          );
+
+          // allow time for the instance to stop, before asserting that it's no
+          // longer responding (without this, ganache may be in the process of
+          // stopping, in which case it will receive the request, but will
+          // [likely] reject)
+          await new Promise<void>(resolve => setTimeout(resolve, 100));
+
+          await assert.rejects(
+            request.post(`http://127.0.0.1:8545`).send({
+              ...jsonRpc,
+              method: "eth_blockNumber"
+            }),
+            "Instance is still responsive after calling stop"
+          );
+        } finally {
+          // attempt to kill the instance, in the case that
+          // stopDetachedInstance() fails
+          if (runningInstance) {
+            try {
+              process.kill(runningInstance.pid);
+            } catch {}
+          }
+        }
+      });
+
+      // this validates the properties on the response from
+      // `startDetachedInstance` in `before()`
+      describe("startDetachedInstance()", () => {
+        it("has reasonable values for non-deterministic properties", () => {
+          const nameRegex = /^[a-z]+_[a-z]+_[a-z]+$/;
+
+          assert(
+            nameRegex.test(runningInstance.name),
+            `Unexpected instance name: ${runningInstance.name}`
+          );
+          assert(
+            runningInstance.startTime >= beforeStartTime &&
+              runningInstance.startTime <= Date.now(),
+            `Unexpected instance start time: ${runningInstance.startTime}`
+          );
+          assert(
+            runningInstance.pid > 0 && runningInstance.pid <= 0xffffffff,
+            `Unexpected pid: ${runningInstance.pid}`
+          );
+        });
+
+        it("has the values passed in as arguments to startDetachedInstance()", () => {
+          assert.strictEqual(
+            runningInstance.flavor,
+            "ethereum",
+            "Unexpected flavor"
+          );
+          assert.strictEqual(
+            runningInstance.host,
+            instanceInfo.server.host,
+            "Unexpected host"
+          );
+          assert.strictEqual(
+            runningInstance.port,
+            instanceInfo.server.port,
+            "Unexpected port"
+          );
+          assert.strictEqual(
+            runningInstance.version,
+            "DEV",
+            "Unexpected version"
+          );
+        });
+
+        it("has a `cmd` property that matches the running process", async () => {
+          const process = (await psList()).find(
+            process => process.pid === runningInstance.pid
+          );
+
+          assert(process !== undefined, "Process not found");
+          assert.strictEqual(
+            runningInstance.cmd,
+            process && process.cmd,
+            "the `cmd` property does not match the process"
+          );
+        });
+      });
+
+      describe("chainId", () => {
+        it("returns the chainId provided to startDetachedInstance()", async () => {
+          const body = {
+            ...jsonRpc,
+            method: "eth_chainId",
+            params: []
+          };
+          const res = await request
+            .post(
+              `http://${instanceInfo.server.host}:${instanceInfo.server.port}`
+            )
+            .send(body);
+
+          const chainId = JSON.parse(res.text).result;
+
+          assert.strictEqual(
+            chainId,
+            "0x4d2",
+            "Doesn't return the expected chainId"
+          );
+        });
+      });
+
+      describe("getDetachedInstances()", () => {
+        it("getDetachedInstances() should return the running instance", async () => {
+          const instances = await getDetachedInstances();
+
+          assert.strictEqual(instances.length, 1);
+          assert.deepStrictEqual(instances[0], runningInstance);
+        });
+      });
+    });
   });
 });
diff --git a/src/packages/cli/tests/process-name.test.ts b/src/packages/cli/tests/process-name.test.ts
new file mode 100644
index 0000000000..55ef22789b
--- /dev/null
+++ b/src/packages/cli/tests/process-name.test.ts
@@ -0,0 +1,63 @@
+import assert from "assert";
+import createProcessName from "../src/process-name";
+
+// generates a "random" number generator function that, when called, returns (in
+// order) each value from the provided array, followed by -1 when there are none
+// left.
+function createRandom(...values: number[]): () => number {
+  return () => (values.length > 0 ? (values.shift() as number) : -1);
+}
+
+const MAX_RANDOM = 0.9999999999999999;
+
+// the values passed to createRandom specify the "random" number required to
+// pick the specified part. This is calculated by:
+// `source.indexOf("term") / source.length`
+const wellKnownNames = [
+  {
+    random: createRandom(0, 0, 0),
+    name: "baked_almond_bar"
+  },
+  {
+    random: createRandom(MAX_RANDOM, MAX_RANDOM, MAX_RANDOM),
+    name: "sticky_tiramisu_waffle"
+  },
+  {
+    random: createRandom(
+      0.2727272727272727,
+      0.21428571428571427,
+      0.4444444444444444
+    ),
+    name: "deepfried_chocolate_ganache"
+  },
+  {
+    random: createRandom(
+      0.18181818181818182,
+      0.07142857142857142,
+      0.9259259259259259
+    ),
+    name: "creamy_banana_truffle"
+  }
+];
+
+// it's not necessarily important that this generates the correct names, but
+// it's good to test that it's doing what we expect.
+describe("createProcessName", () => {
+  for (const wellKnownName of wellKnownNames) {
+    it(`should create the correct instance name: ${wellKnownName.name}`, () => {
+      const generatedName = createProcessName(wellKnownName.random);
+
+      assert.strictEqual(generatedName, wellKnownName.name);
+    });
+  }
+
+  it("should create a process name, without a mocked RNG", () => {
+    const generatedName = createProcessName();
+    // each part must be at least 3 chars long, and at most 20 chars
+    const nameRegex = /^([a-z]{3,20}_){2}[a-z]{3,20}$/;
+    assert(
+      nameRegex.test(generatedName),
+      `Exepected to have generated a reasonable name, got "${generatedName}"`
+    );
+  });
+});