diff --git a/.travis.yml b/.travis.yml
index 7b63a7070..a96439b72 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -140,7 +140,7 @@ matrix:
         apt:
           sources: ['ubuntu-toolchain-r-test']
           packages: ['libstdc++-5-dev']
-      env: CLANG_VERSION='4.0.0' BUILD_TYPE='Release' ENABLE_MASON=ON ENABLE_LTO=ON ENABLE_NODE_BINDINGS=ON PUBLISH_NODE_BINDINGS=On
+      env: CLANG_VERSION='4.0.0' BUILD_TYPE='Release' ENABLE_MASON=ON ENABLE_LTO=ON ENABLE_NODE_BINDINGS=ON PUBLISH_NODE_BINDINGS=On JOBS=4
       nodejs: "4"
       script:
           npm run nodejs-tests
@@ -151,7 +151,7 @@ matrix:
         apt:
           sources: ['ubuntu-toolchain-r-test']
           packages: ['libstdc++-5-dev']
-      env: CLANG_VERSION='4.0.0' BUILD_TYPE='Debug' ENABLE_MASON=ON ENABLE_LTO=ON ENABLE_NODE_BINDINGS=ON PUBLISH_NODE_BINDINGS=On
+      env: CLANG_VERSION='4.0.0' BUILD_TYPE='Debug' ENABLE_MASON=ON ENABLE_LTO=ON ENABLE_NODE_BINDINGS=ON PUBLISH_NODE_BINDINGS=On JOBS=4
       nodejs: "4"
       script:
           npm run nodejs-tests
@@ -162,7 +162,7 @@ matrix:
         apt:
           sources: ['ubuntu-toolchain-r-test']
           packages: ['libstdc++-5-dev']
-      env: CLANG_VERSION='4.0.0' BUILD_TYPE='Release' ENABLE_MASON=ON ENABLE_LTO=ON ENABLE_NODE_BINDINGS=ON PUBLISH_NODE_BINDINGS=On
+      env: CLANG_VERSION='4.0.0' BUILD_TYPE='Release' ENABLE_MASON=ON ENABLE_LTO=ON ENABLE_NODE_BINDINGS=ON PUBLISH_NODE_BINDINGS=On JOBS=4
       nodejs: "6"
       script:
           npm run nodejs-tests
@@ -173,7 +173,7 @@ matrix:
         apt:
           sources: ['ubuntu-toolchain-r-test']
           packages: ['libstdc++-5-dev']
-      env: CLANG_VERSION='4.0.0' BUILD_TYPE='Debug' ENABLE_MASON=ON ENABLE_LTO=ON ENABLE_NODE_BINDINGS=ON PUBLISH_NODE_BINDINGS=On
+      env: CLANG_VERSION='4.0.0' BUILD_TYPE='Debug' ENABLE_MASON=ON ENABLE_LTO=ON ENABLE_NODE_BINDINGS=ON PUBLISH_NODE_BINDINGS=On JOBS=4
       nodejs: "6"
       script:
           npm run nodejs-tests
@@ -181,8 +181,12 @@ matrix:
 before_install:
   - if [[ ! -z $TARGET_ARCH ]] ; then source ./scripts/travis/before_install.$TARGET_ARCH.sh ; fi
   - |
-    if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then
-      export JOBS=$((`nproc` + 1))
+    if [[ -z $JOBS ]]; then
+      if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then
+        export JOBS=$((`nproc` + 1))
+      elif [[ "${TRAVIS_OS_NAME}" == "osx" ]]; then
+        export JOBS=$((`sysctl -n hw.ncpu` + 1))
+      fi
     fi
   - |
     if [ -n "${RUN_CLANG_FORMAT}" ]; then
@@ -190,7 +194,6 @@ before_install:
     fi
   - |
     if [[ "${TRAVIS_OS_NAME}" == "osx" ]]; then
-      export JOBS=$((`sysctl -n hw.ncpu` + 1))
       sudo mdutil -i off /
     fi
   - |