Update python/ql/test/experimental/dataflow/validTest.py

Co-authored-by: Taus <tausbn@github.com>

Author: RasmusWL

python/ql/test/experimental/dataflow/validTest.py

@@ -85,4 +85,4 @@ def check_tests_valid_after_version(testFile, version):
     # check_tests_valid("module-initialization.test")
     # check_tests_valid("module-initialization.testOnce")
 
-    print("\n🎉 All test passed 🎉")
+    print("\n🎉 All tests passed 🎉")