diff --git a/.travis.yml b/.travis.yml
index 4e3c2dfe..4e918498 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,7 +22,7 @@ addons:
     - cmake-data
 
 script:
-    - cargo test --all
+    - cargo test --all -j 1
 
 after_success:
     - |