diff --git a/test/lit.cfg b/test/lit.cfg
index dc08c679ca3..8828e06f3ea 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -39,8 +39,8 @@ config.test_format = lit.formats.ShTest(execute_external)
 # To ignore test output on stderr so it doesn't trigger failures uncomment this:
 #config.test_format = lit.formats.TclTest(ignoreStdErr=True)
 
-# suffixes: A list of file extensions to treat as test files, this is actually
-# set by on_clone().
+# suffixes: A list of file extensions to treat as test files. This is overriden
+# by individual lit.local.cfg files in the test subdirectories.
 config.suffixes = []
 
 # excludes: A list of directories to exclude from the testsuite. The 'Inputs'
diff --git a/utils/lit/lit/TestingConfig.py b/utils/lit/lit/TestingConfig.py
index 925099ca5d2..d4d218b5702 100644
--- a/utils/lit/lit/TestingConfig.py
+++ b/utils/lit/lit/TestingConfig.py
@@ -45,7 +45,6 @@ class TestingConfig:
                                    environment = environment,
                                    substitutions = [],
                                    unsupported = False,
-                                   on_clone = None,
                                    test_exec_root = None,
                                    test_source_root = None,
                                    excludes = [],
@@ -90,7 +89,7 @@ class TestingConfig:
         return config
 
     def __init__(self, parent, name, suffixes, test_format,
-                 environment, substitutions, unsupported, on_clone,
+                 environment, substitutions, unsupported,
                  test_exec_root, test_source_root, excludes,
                  available_features, pipefail):
         self.parent = parent
@@ -100,7 +99,6 @@ class TestingConfig:
         self.environment = dict(environment)
         self.substitutions = list(substitutions)
         self.unsupported = unsupported
-        self.on_clone = on_clone
         self.test_exec_root = test_exec_root
         self.test_source_root = test_source_root
         self.excludes = set(excludes)
@@ -111,15 +109,12 @@ class TestingConfig:
         # FIXME: Chain implementations?
         #
         # FIXME: Allow extra parameters?
-        cfg = TestingConfig(self, self.name, self.suffixes, self.test_format,
-                            self.environment, self.substitutions,
-                            self.unsupported, self.on_clone,
-                            self.test_exec_root, self.test_source_root,
-                            self.excludes, self.available_features,
-                            self.pipefail)
-        if cfg.on_clone:
-            cfg.on_clone(self, cfg, path)
-        return cfg
+        return TestingConfig(self, self.name, self.suffixes, self.test_format,
+                             self.environment, self.substitutions,
+                             self.unsupported,
+                             self.test_exec_root, self.test_source_root,
+                             self.excludes, self.available_features,
+                             self.pipefail)
 
     def finish(self, litConfig):
         """finish() - Finish this config object, after loading is complete."""