diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl
index c8a42d5..c444c4f 100755
--- a/tools/testing/ktest/ktest.pl
+++ b/tools/testing/ktest/ktest.pl
@@ -3634,6 +3634,8 @@
 
     $iteration = $i;
 
+    undef %force_config;
+
     my $makecmd = set_test_option("MAKE_CMD", $i);
 
     # Load all the options into their mapped variable names