diff --git a/kokoro/macos/prepare_build_macos_rc b/kokoro/macos/prepare_build_macos_rc
index 830e7eee67..d1154e3f5c 100755
--- a/kokoro/macos/prepare_build_macos_rc
+++ b/kokoro/macos/prepare_build_macos_rc
@@ -37,10 +37,14 @@ sudo rm -rf \
 sudo rm -rf \
     /usr/local/bin/2to3* \
     /usr/local/bin/idle3* \
+    /usr/local/bin/pip3 \
     /usr/local/bin/pydoc3* \
     /usr/local/bin/python3* \
     /usr/local/bin/pyvenv*
 
+git -C /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core fetch --unshallow
+git -C /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask fetch --unshallow
+
 brew update
 brew upgrade