diff --git a/.travis.yml b/.travis.yml
index fa50962..900c6b4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -90,7 +90,10 @@ before_install:
         brew unlink cmake
         brew install llvm cmake
       fi
-  - pip install cram
+  - |
+      if [ "${TESTS:-ON}" = "ON" ]; then
+        pip install --user cram
+      fi
   - export CXX=${CC/gcc/g++}; export CXX=${CXX/clang/clang++}
   - $CC --version
   - $CXX --version