diff --git a/.travis.yml b/.travis.yml
index 3460db719..4a25e7121 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -151,7 +151,8 @@ jobs:
       env:
         - CMAKE=1
 
-    - os: osx
+    - &test-macos
+      os: osx
       stage: test
       osx_image: xcode8
       before_script:
@@ -163,6 +164,10 @@ jobs:
       env:
         - BTYPE="BINARY=64 INTERFACE64=1"
 
+    - <<: *test-macos
+      env:
+        - BTYPE="BINARY=32"
+
 # whitelist
 branches:
   only: