diff --git a/.travis.yml b/.travis.yml
index 1a45b96..af7089f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -136,6 +136,7 @@ jobs:
       env:
         - STAGE=test
         - NAME=littlefs-migration
+      if: branch !~ -prefix$
       install:
         - sudo apt-get install libfuse-dev
         - git clone --depth 1 https://github.com/geky/littlefs-fuse -b v2-alpha v2