diff --git a/t/file_data_filter-removefiles.t b/t/file_data_filter-removefiles.t
index 2adafae..4686814 100755
--- a/t/file_data_filter-removefiles.t
+++ b/t/file_data_filter-removefiles.t
@@ -18,7 +18,8 @@ check() {
 }
 
 git_create() {
-	git init -q "$1"
+	git init -q "$1" &&
+	git -C "$1" config core.ignoreCase false
 }
 
 git_convert() {
diff --git a/t/file_data_filter.t b/t/file_data_filter.t
index aa054c9..8b3eb52 100755
--- a/t/file_data_filter.t
+++ b/t/file_data_filter.t
@@ -17,7 +17,8 @@ check() {
 }
 
 git_create() {
-	git init -q "$1"
+	git init -q "$1" &&
+	git -C "$1" config core.ignoreCase false
 }
 
 git_convert() {
diff --git a/t/main.t b/t/main.t
index 25acb35..659cabe 100755
--- a/t/main.t
+++ b/t/main.t
@@ -17,6 +17,7 @@ git_clone() {
 	(
 	git init -q "$2" &&
 	cd "$2" &&
+	git config core.ignoreCase false &&
 	hg-fast-export.sh --repo "../$1"
 	)
 }
diff --git a/t/smoke-test.t b/t/smoke-test.t
index 73ffff8..0e0d206 100755
--- a/t/smoke-test.t
+++ b/t/smoke-test.t
@@ -17,7 +17,8 @@ check() {
 }
 
 git_create() {
-	git init -q "$1"
+	git init -q "$1" &&
+	git -C "$1" config core.ignoreCase false
 }
 
 git_convert() {