diff --git a/Dockerfile b/Dockerfile
index 0f685bda..19ad4348 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,4 +6,4 @@ WORKDIR /app
 
 RUN pip install --no-cache-dir -r requirements.txt
 
-CMD pytest --network $NETWORK test_v4_router.py -vvv -s
\ No newline at end of file
+CMD pytest --network=$NETWORK test_v4_router.py -vvv -s
\ No newline at end of file