diff --git a/errors_test.go b/errors_test.go
new file mode 100644
index 0000000..5d05e99
--- /dev/null
+++ b/errors_test.go
@@ -0,0 +1,9 @@
+package mar
+
+import "testing"
+
+func TestDebugPrint(t *testing.T) {
+	debug = "true"
+	debugPrint("debug is %s\n", debug)
+	debug = "false"
+}