diff --git a/testing/test_assertrewrite.py b/testing/test_assertrewrite.py
index 04e0c6f9e..8cf492966 100644
--- a/testing/test_assertrewrite.py
+++ b/testing/test_assertrewrite.py
@@ -25,16 +25,6 @@ from _pytest.config import ExitCode
 from _pytest.pathlib import Path
 
 
-def setup_module(mod):
-    mod._old_reprcompare = util._reprcompare
-    _pytest._code._reprcompare = None
-
-
-def teardown_module(mod):
-    util._reprcompare = mod._old_reprcompare
-    del mod._old_reprcompare
-
-
 def rewrite(src):
     tree = ast.parse(src)
     rewrite_asserts(tree, src.encode())