diff --git a/run_tests b/run_tests
index 9f19e2e..07cd98d 100755
--- a/run_tests
+++ b/run_tests
@@ -50,7 +50,7 @@
   os.environ['PYTHONPATH'] = pythonpath
 
   pytest = find_pytest()
-  return subprocess.run([pytest] + argv, check=True)
+  return subprocess.run([pytest] + argv, check=False).returncode
 
 
 if __name__ == '__main__':