diff --git a/SprintLib/testers/Python3Tester.py b/SprintLib/testers/Python3Tester.py
index 1ca8ada..550db6d 100644
--- a/SprintLib/testers/Python3Tester.py
+++ b/SprintLib/testers/Python3Tester.py
@@ -8,7 +8,7 @@ class Python3Tester(BaseTester):
 
     def before_test(self):
         for file in listdir(self.solution.testing_directory):
-            if file.endswith(".py"):
+            if file.endswith(".py") and file != 'checker.py':
                 self.file = file
                 break
         if self.file is None: