Merge pull request #554 from ahoppen/pr/run-tests-in-parallel

Only run tests in parallel on Linux again

Author: ahoppen

Utilities/build-script-helper.py

@@ -121,10 +121,7 @@ def handle_invocation(swift_exec, args):
     print('Cleaning ' + tests)
     shutil.rmtree(tests, ignore_errors=True)
     test_args = swiftpm_args
-    # Running tests in parallel causes nondeterministic failures on Linux (rdar://92260631).
-    # Only enable parallel testing on Darwin.
-    if platform.system() == 'Darwin':
-      test_args += ['--parallel']
+    test_args += ['--parallel']
     swiftpm('test', swift_exec, test_args, env)
   elif args.action == 'install':
     bin_path = swiftpm_bin_path(swift_exec, swiftpm_args, env)