diff --git a/tests/test_helpers.bash b/tests/test_helpers.bash
index 63994f2..ed1462c 100644
--- a/tests/test_helpers.bash
+++ b/tests/test_helpers.bash
@@ -3,6 +3,7 @@
 # check dependencies
 (
     type docker &>/dev/null || ( echo "docker is not available"; exit 1 )
+    type unzip &>/dev/null || ( echo "unzip is not available"; exit 1 )
     type curl &>/dev/null || ( echo "curl is not available"; exit 1 )
 )>&2