diff --git a/conda_smithy/templates/travis.yml.tmpl b/conda_smithy/templates/travis.yml.tmpl
index e138cff6f..4ca74ce80 100644
--- a/conda_smithy/templates/travis.yml.tmpl
+++ b/conda_smithy/templates/travis.yml.tmpl
@@ -28,7 +28,10 @@ env:
 {% endblock %}
 
 before_install:
+    # Remove homebrew.
     - brew remove --force $(brew list)
+    - brew cleanup -s
+    - rm -rf $(brew --cache)
 
 install:
     - |