diff --git a/testing/test-docker.sh b/testing/test-docker.sh
index 518d80a..718d97c 100755
--- a/testing/test-docker.sh
+++ b/testing/test-docker.sh
@@ -83,8 +83,8 @@ if ! wait_for_container "sos-test"; then
     die "Container sos-test is not healthy"
 fi
 
-# run the tests.
-"${SCRIPT_DIR}/test.sh" "http://127.0.0.1:7703"
+# run the tests. Docker inside docker support!
+"${SCRIPT_DIR}/test.sh" "http://sos-test:7703"
 RESULT=$?
 
 # clean up.