diff --git a/.travis.yml b/.travis.yml
index 7389acb..fbd55d3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,8 +5,9 @@ services:
   - docker
 
 before_script:
+  - cp -v extras/test/Dockerfile .
   - docker build -t dyne/tomb .
   - docker run -it --privileged dyne/tomb /bin/bash -c "oracle & make test"
 
 script:
-  - docker run -it --privileged dyne/tomb /bin/bash -c "make --directory=extras/kdf-keys test"
\ No newline at end of file
+  - docker run -it --privileged dyne/tomb /bin/bash -c "make -C extras/kdf-keys test"
diff --git a/Dockerfile b/extras/test/Dockerfile
similarity index 100%
rename from Dockerfile
rename to extras/test/Dockerfile