diff --git a/t/t7401-submodule-summary.sh b/t/t7401-submodule-summary.sh
index 86ed2a2a2d..f34d8f0bb2 100755
--- a/t/t7401-submodule-summary.sh
+++ b/t/t7401-submodule-summary.sh
@@ -8,6 +8,10 @@ test_description='Summary support for submodules
 This test tries to verify the sanity of summary subcommand of git-submodule.
 '
 
+case $(uname -s) in
+*MINGW*) GIT_TEST_CMP="diff -uw";;
+esac
+
 . ./test-lib.sh
 
 add_file () {