diff --git a/test/test-lib.sh b/test/test-lib.sh
index 61ffa8b..7a4a4f7 100644
--- a/test/test-lib.sh
+++ b/test/test-lib.sh
@@ -15,6 +15,8 @@ GIT_COMMITTER_NAME='C O Mitter'
 export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
 export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
 
+unset XDG_CONFIG_HOME
+
 if [[ $(uname -s) = MSYS* ]]; then
 	test_set_prereq WIN
 	export TEST_CMP='diff --strip-trailing-cr -u'