Issue #25456: Fix test_idle when Tcl/Tk DLLs are loaded from python.exe's home
rather than from elsewhere on PATH.
diff --git a/Lib/test/test_idle.py b/Lib/test/test_idle.py
index 141e89e..132657b 100644
--- a/Lib/test/test_idle.py
+++ b/Lib/test/test_idle.py
@@ -1,11 +1,13 @@
import unittest
-from test import support
-from test.support import import_module
+from test.support import import_module, import_fresh_module
# Skip test if _thread or _tkinter wasn't built or idlelib was deleted.
import_module('threading') # imported by PyShell, imports _thread
tk = import_module('tkinter') # imports _tkinter
idletest = import_module('idlelib.idle_test')
+# Make sure TCL_LIBRARY is set properly on Windows. Note that this will
+# cause a warning about test_idle modifying the environment
+import_fresh_module('tkinter._fix')
# Without test_main present, regrtest.runtest_inner (line1219) calls
# unittest.TestLoader().loadTestsFromModule(this_module) which calls