diff --git a/package-lock.json b/package-lock.json
index 13e72a974..36bf4ffcf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12480,6 +12480,19 @@
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@@ -16385,6 +16398,25 @@
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+      "resolved": "https://registry.npmjs.org/internal-ip/-/internal-ip-6.2.0.tgz",
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+      "license": "MIT",
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@@ -16433,6 +16465,26 @@
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+      "resolved": "https://registry.npmjs.org/ip-regex/-/ip-regex-4.3.0.tgz",
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+      "license": "MIT",
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+      "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.1.tgz",
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+      "license": "MIT",
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@@ -16723,6 +16775,19 @@
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+      "resolved": "https://registry.npmjs.org/is-ip/-/is-ip-3.1.0.tgz",
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+      "license": "MIT",
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+      },
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@@ -21483,6 +21548,22 @@
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+      "resolved": "https://registry.npmjs.org/p-event/-/p-event-4.2.0.tgz",
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+      "license": "MIT",
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+      },
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+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.10.tgz",
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+      "license": "MIT",
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@@ -31499,6 +31581,7 @@
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         "@web/dev-server-esbuild": "^0.2.16",
         "@web/test-runner": "^0.13.22",
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         "es-dev-server": "^2.1.0",
@@ -31791,6 +31874,147 @@
         "url": "https://opencollective.com/typescript-eslint"
       }
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+    "packages/openscd/node_modules/@web/browser-logs": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/@web/browser-logs/-/browser-logs-0.4.0.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "errorstacks": "^2.2.0"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
+    "packages/openscd/node_modules/@web/dev-server-core": {
+      "version": "0.7.3",
+      "resolved": "https://registry.npmjs.org/@web/dev-server-core/-/dev-server-core-0.7.3.tgz",
+      "integrity": "sha512-GS+Ok6HiqNZOsw2oEv5V2OISZ2s/6icJodyGjUuD3RChr0G5HiESbKf2K8mZV4shTz9sRC9KSQf8qvno2gPKrQ==",
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+      "license": "MIT",
+      "dependencies": {
+        "@types/koa": "^2.11.6",
+        "@types/ws": "^7.4.0",
+        "@web/parse5-utils": "^2.1.0",
+        "chokidar": "^4.0.1",
+        "clone": "^2.1.2",
+        "es-module-lexer": "^1.0.0",
+        "get-stream": "^6.0.0",
+        "is-stream": "^2.0.0",
+        "isbinaryfile": "^5.0.0",
+        "koa": "^2.13.0",
+        "koa-etag": "^4.0.0",
+        "koa-send": "^5.0.1",
+        "koa-static": "^5.0.0",
+        "lru-cache": "^8.0.4",
+        "mime-types": "^2.1.27",
+        "parse5": "^6.0.1",
+        "picomatch": "^2.2.2",
+        "ws": "^7.5.10"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
+    "packages/openscd/node_modules/@web/dev-server-core/node_modules/parse5": {
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+      "resolved": "https://registry.npmjs.org/parse5/-/parse5-6.0.1.tgz",
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+      "license": "MIT"
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+        "parse5": "^6.0.1"
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+      "dev": true,
+      "license": "MIT"
+    },
+    "packages/openscd/node_modules/@web/test-runner-core": {
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+      "resolved": "https://registry.npmjs.org/@web/test-runner-core/-/test-runner-core-0.13.4.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/code-frame": "^7.12.11",
+        "@types/babel__code-frame": "^7.0.2",
+        "@types/co-body": "^6.1.0",
+        "@types/convert-source-map": "^2.0.0",
+        "@types/debounce": "^1.2.0",
+        "@types/istanbul-lib-coverage": "^2.0.3",
+        "@types/istanbul-reports": "^3.0.0",
+        "@web/browser-logs": "^0.4.0",
+        "@web/dev-server-core": "^0.7.3",
+        "chokidar": "^4.0.1",
+        "cli-cursor": "^3.1.0",
+        "co-body": "^6.1.0",
+        "convert-source-map": "^2.0.0",
+        "debounce": "^1.2.0",
+        "dependency-graph": "^0.11.0",
+        "globby": "^11.0.1",
+        "internal-ip": "^6.2.0",
+        "istanbul-lib-coverage": "^3.0.0",
+        "istanbul-lib-report": "^3.0.1",
+        "istanbul-reports": "^3.0.2",
+        "log-update": "^4.0.0",
+        "nanocolors": "^0.2.1",
+        "nanoid": "^3.1.25",
+        "open": "^8.0.2",
+        "picomatch": "^2.2.2",
+        "source-map": "^0.7.3"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
+    "packages/openscd/node_modules/@web/test-runner-coverage-v8": {
+      "version": "0.8.0",
+      "resolved": "https://registry.npmjs.org/@web/test-runner-coverage-v8/-/test-runner-coverage-v8-0.8.0.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@web/test-runner-core": "^0.13.0",
+        "istanbul-lib-coverage": "^3.0.0",
+        "lru-cache": "^8.0.4",
+        "picomatch": "^2.2.2",
+        "v8-to-istanbul": "^9.0.1"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
+    "packages/openscd/node_modules/@web/test-runner-playwright": {
+      "version": "0.11.0",
+      "resolved": "https://registry.npmjs.org/@web/test-runner-playwright/-/test-runner-playwright-0.11.0.tgz",
+      "integrity": "sha512-s+f43DSAcssKYVOD9SuzueUcctJdHzq1by45gAnSCKa9FQcaTbuYe8CzmxA21g+NcL5+ayo4z+MA9PO4H+PssQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@web/test-runner-core": "^0.13.0",
+        "@web/test-runner-coverage-v8": "^0.8.0",
+        "playwright": "^1.22.2"
+      },
+      "engines": {
+        "node": ">=18.0.0"
+      }
+    },
     "packages/openscd/node_modules/acorn": {
       "version": "7.4.1",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.4.1.tgz",
@@ -31834,6 +32058,22 @@
         "balanced-match": "^1.0.0"
       }
     },
+    "packages/openscd/node_modules/chokidar": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-4.0.1.tgz",
+      "integrity": "sha512-n8enUVCED/KVRQlab1hr3MVpcVMvxtZjmEa956u+4YijlmQED223XMSYj2tLuKvr4jcCTzNNMpQDUer72MMmzA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "readdirp": "^4.0.1"
+      },
+      "engines": {
+        "node": ">= 14.16.0"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
     "packages/openscd/node_modules/cli-truncate": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/cli-truncate/-/cli-truncate-2.1.0.tgz",
@@ -31909,6 +32149,13 @@
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       "dev": true
     },
+    "packages/openscd/node_modules/es-module-lexer": {
+      "version": "1.5.4",
+      "resolved": "https://registry.npmjs.org/es-module-lexer/-/es-module-lexer-1.5.4.tgz",
+      "integrity": "sha512-MVNK56NiMrOwitFB7cqDwq0CQutbw+0BvLshJSse0MUNU+y1FC3bUS/AQg7oUng+/wKrrki7JfmwtVHkVfPLlw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "packages/openscd/node_modules/eslint": {
       "version": "7.32.0",
       "resolved": "https://registry.npmjs.org/eslint/-/eslint-7.32.0.tgz",
@@ -32223,6 +32470,16 @@
         "tslib": "^2.1.0"
       }
     },
+    "packages/openscd/node_modules/lru-cache": {
+      "version": "8.0.5",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-8.0.5.tgz",
+      "integrity": "sha512-MhWWlVnuab1RG5/zMRRcVGXZLCXrZTgfwMikgzCegsPnG62yDQo5JnqKkrK4jO5iKqDAZGItAqN5CtKBCBWRUA==",
+      "dev": true,
+      "license": "ISC",
+      "engines": {
+        "node": ">=16.14"
+      }
+    },
     "packages/openscd/node_modules/parse5": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/parse5/-/parse5-5.1.1.tgz",
@@ -32245,6 +32502,20 @@
         }
       ]
     },
+    "packages/openscd/node_modules/readdirp": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-4.0.2.tgz",
+      "integrity": "sha512-yDMz9g+VaZkqBYS/ozoBJwaBhTbZo3UNYQHNRw1D3UFQB8oHB4uS/tAODO+ZLjGWmUbKnIlOWO+aaIiAxrUWHA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">= 14.16.0"
+      },
+      "funding": {
+        "type": "individual",
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
     "packages/openscd/node_modules/rxjs": {
       "version": "6.6.7",
       "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.6.7.tgz",
@@ -32380,6 +32651,21 @@
         "node": ">=4.2.0"
       }
     },
+    "packages/openscd/node_modules/v8-to-istanbul": {
+      "version": "9.3.0",
+      "resolved": "https://registry.npmjs.org/v8-to-istanbul/-/v8-to-istanbul-9.3.0.tgz",
+      "integrity": "sha512-kiGUalWN+rgBJ/1OHZsBtU4rXZOfj/7rKQxULKlIzwzQSvMJUUNgPwJEEh7gU6xEVxC0ahoOBvN2YI8GH6FNgA==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "@jridgewell/trace-mapping": "^0.3.12",
+        "@types/istanbul-lib-coverage": "^2.0.1",
+        "convert-source-map": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=10.12.0"
+      }
+    },
     "packages/openscd/node_modules/wrap-ansi": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
diff --git a/packages/openscd/package.json b/packages/openscd/package.json
index 4857ec8a7..2c57aedc3 100644
--- a/packages/openscd/package.json
+++ b/packages/openscd/package.json
@@ -39,13 +39,13 @@
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     "@material/mwc-textfield": "0.22.1",
     "@material/mwc-top-app-bar-fixed": "0.22.1",
+    "@openscd/core": "*",
+    "@openscd/xml": "*",
     "ace-custom-element": "^1.6.5",
     "lit": "^2.2.7",
     "lit-translate": "^1.2.1",
     "marked": "^4.0.10",
-    "panzoom": "^9.4.2",
-    "@openscd/core": "*",
-    "@openscd/xml": "*"
+    "panzoom": "^9.4.2"
   },
   "scripts": {
     "clean": "rimraf build",
@@ -85,6 +85,7 @@
     "@typescript-eslint/parser": "^4.29.2",
     "@web/dev-server-esbuild": "^0.2.16",
     "@web/test-runner": "^0.13.22",
+    "@web/test-runner-playwright": "^0.11.0",
     "concurrently": "^6.2.1",
     "deepmerge": "^4.2.2",
     "es-dev-server": "^2.1.0",