diff --git a/.travis.yml b/.travis.yml
index 23bae6d9f17..39853e35858 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,6 +28,7 @@ matrix:
         RUSTC_RETRY_LINKER_ON_SEGFAULT=1
         SCCACHE_ERROR_LOG=/tmp/sccache.log
         MACOSX_DEPLOYMENT_TARGET=10.7
+        NO_LLVM_ASSERTIONS=1
       os: osx
       osx_image: xcode7
 
@@ -46,6 +47,7 @@ matrix:
         SCCACHE_ERROR_LOG=/tmp/sccache.log
         MACOSX_DEPLOYMENT_TARGET=10.8
         MACOSX_STD_DEPLOYMENT_TARGET=10.7
+        NO_LLVM_ASSERTIONS=1
       os: osx
       osx_image: xcode8.2
     - env: >
@@ -56,6 +58,7 @@ matrix:
         SCCACHE_ERROR_LOG=/tmp/sccache.log
         MACOSX_DEPLOYMENT_TARGET=10.8
         MACOSX_STD_DEPLOYMENT_TARGET=10.7
+        NO_LLVM_ASSERTIONS=1
       os: osx
       osx_image: xcode8.2
 
@@ -73,6 +76,7 @@ matrix:
         RUSTC_RETRY_LINKER_ON_SEGFAULT=1
         SCCACHE_ERROR_LOG=/tmp/sccache.log
         MACOSX_DEPLOYMENT_TARGET=10.7
+        NO_LLVM_ASSERTIONS=1
       os: osx
       osx_image: xcode7
     - env: >
@@ -83,6 +87,7 @@ matrix:
         RUSTC_RETRY_LINKER_ON_SEGFAULT=1
         SCCACHE_ERROR_LOG=/tmp/sccache.log
         MACOSX_DEPLOYMENT_TARGET=10.7
+        NO_LLVM_ASSERTIONS=1
       os: osx
       osx_image: xcode7