diff --git a/lib/srfi/130/test.sld b/lib/srfi/130/test.sld
index f423faba..fbb507e6 100644
--- a/lib/srfi/130/test.sld
+++ b/lib/srfi/130/test.sld
@@ -154,6 +154,8 @@
           (string-contains s "mer"))
         (test "string-contains" #f
           (string-contains s "Mer"))
+        (test-assert "string-contains"
+          (string-contains s "mer" 1))
         (test-assert "string-contains"
           (string-contains s "mer" 1 8))
         (test-not "string-contains"