fix tox

tox.ini

@@ -12,16 +12,21 @@ deps =
     black
     pylint
     pytest
+allowlist_externals =
+    bash
+    timeout
+    grep
 commands =
     pylint --rcfile .pylintrc locust_plugins/
     python -c 'from glob import glob; import subprocess; subprocess.check_call(["pylint", "--rcfile", ".pylintrc"] + glob("examples/*.py"))'
     pytest
     black --check locust_plugins/
-    bash -ec "python3 examples/rest_ex.py | grep 'my custom error message with response text, response was {\"args\"'"
+    bash -ec "PYTHONUNBUFFERED=1 timeout 5s python3 examples/rest_ex.py > output.txt || true"
+    grep -m 1 'my custom error message with response text, response was {"args"' output.txt
     locust -f examples/jmeter_listener_example.py --headless -t 1
     locust-compose up -d
     /bin/sleep 10
-    bash -ec "locust -f examples/rest_ex.py --timescale --headless -t 1 -s 60 --exit-code-on-error 0 2>&1 | grep 'Report: http://localhost:3000/d/qjIIww4Zz?&var-testplan=examples/rest_ex.py&from='"
+    bash -ec "locust -f examples/rest_ex.py --timescale --headless -t 2 -s 60 --exit-code-on-error 0 2>&1 | grep 'Report: http://localhost:3000/d/qjIIww4Zz?&var-testplan=examples/rest_ex.py&from='"
     ; check that main dashboard exists
     curl --fail 'http://localhost:3000/api/dashboards/uid/qjIIww4Zz'
     ; run this if you want to ensure a clean slate