Merge pull request #758 from VWS-Python/simpler-custom-linters

Use no:terminal for simpler, more explicit parsing

Author: adamtheturtle

ci/custom_linters.py

@@ -29,13 +29,9 @@ def _tests_from_pattern(ci_pattern: str) -> Set[str]:
     From a CI pattern, get all tests ``pytest`` would collect.
     """
     tests: Set[str] = set([])
-    args = ['pytest', '--collect-only', ci_pattern, '-q']
+    args = ['pytest', '-p', 'no:terminal', '--collect-only', ci_pattern]
     result = subprocess.run(args=args, stdout=subprocess.PIPE, check=True)
-    output = result.stdout
-    for line in output.splitlines():
-        if line and not line.startswith(b'no tests ran in'):
-            tests.add(line.decode())
-
+    tests = set(result.stdout.decode().splitlines())
     return tests