diff --git a/Lib/test/regrtest.py b/Lib/test/regrtest.py
index 067d6a22bdb..0cc0c5783aa 100755
--- a/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@ -728,7 +728,6 @@ def dash_R_cleanup(fs, ps, pic, abcs):
     dircache.reset()
     linecache.clearcache()
     mimetypes._default_mime_types()
-    struct._cache.clear()
     filecmp._cache.clear()
     doctest.master = None