diff --git a/Lib/test/libregrtest/utils.py b/Lib/test/libregrtest/utils.py
index 8578a028c78bc2..332dcc4c6db247 100644
--- a/Lib/test/libregrtest/utils.py
+++ b/Lib/test/libregrtest/utils.py
@@ -210,3 +210,10 @@ def clear_caches():
     else:
         for f in typing._cleanups:
             f()
+
+    try:
+        fractions = sys.modules['fractions']
+    except KeyError:
+        pass
+    else:
+        fractions._hash_algorithm.cache_clear()