diff --git a/.travis.yml b/.travis.yml
index bd45b096d..f14eda984 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,17 +20,17 @@ matrix:
     - os: osx
       osx_image: xcode9.4  # macOS 10.13
       env:
-        - MATRIX_EVAL="brew update; brew bundle; shopt -s expand_aliases; alias python='python3';"
+        - MATRIX_EVAL="brew update; brew bundle; shopt -s expand_aliases; alias python='python3'; alias pip='pip3';"
         - ARCHFLAGS="-std=c++11"
     - os: osx
       osx_image: xcode8.3  # macOS 10.12
       env:
-        - MATRIX_EVAL="brew update; brew bundle; shopt -s expand_aliases; alias python='python3';"
+        - MATRIX_EVAL="brew update; brew bundle; shopt -s expand_aliases; alias python='python3'; alias pip='pip3';"
         - ARCHFLAGS="-std=c++11"
     - os: osx
       osx_image: xcode8  # macOS 10.11
       env:
-        - MATRIX_EVAL="brew update; brew bundle; shopt -s expand_aliases; alias python='python3';"
+        - MATRIX_EVAL="brew update; brew bundle; shopt -s expand_aliases; alias python='python3'; alias pip='pip3';"
         - ARCHFLAGS="-std=c++11"
     - os: linux
       dist: trusty # Ubuntu 14.04