make clean before zstd-lz4 compatibility tests

to ensure zstd is rebuilt with lz4 support

diff --git a/.travis.yml b/.travis.yml
index 5436b358e303570d389b77c81e6d7845c3aad76e..95abee6858bcdd64a16fe0cee85f434ecc230aba 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,7 +26,7 @@ matrix:
     - env: Cmd='make -j uasanregressiontest'
     - env: Cmd='make -j msanregressiontest'
 
-    - env: Cmd='make -C tests versionsTest && make lz4install && make -C tests test-lz4'
+    - env: Cmd='make -C tests versionsTest && make lz4install && make clean && make -C tests test-lz4'
 
     # OS X Mavericks
     - env: Cmd="make test"