[Tests] pin postcss to v7
diff --git a/test/slow/nvm reinstall-packages/should work as expected b/test/slow/nvm reinstall-packages/should work as expected
index fdc3800..d6aa9f1 100755
--- a/test/slow/nvm reinstall-packages/should work as expected
+++ b/test/slow/nvm reinstall-packages/should work as expected
@@ -10,8 +10,8 @@
 nvm use 0.10.28
 (cd test-npmlink && npm link)
 
-EXPECTED_PACKAGES="autoprefixer bower david grunt-cli grunth-cli http-server jshint marked node-gyp npmlist recursive-blame spawn-sync test-npmlink uglify-js yo"
-EXPECTED_PACKAGES_INSTALL="autoprefixer bower david@11 grunt-cli grunth-cli http-server jshint marked node-gyp npmlist recursive-blame spawn-sync test-npmlink uglify-js yo@1"
+EXPECTED_PACKAGES="autoprefixer bower david grunt-cli grunth-cli http-server jshint marked node-gyp npmlist postcss recursive-blame spawn-sync test-npmlink uglify-js yo"
+EXPECTED_PACKAGES_INSTALL="autoprefixer bower david@11 grunt-cli grunth-cli http-server jshint marked node-gyp npmlist postcss@7 recursive-blame spawn-sync test-npmlink uglify-js yo@1"
 
 echo "$EXPECTED_PACKAGES_INSTALL" | sed -e 's/test-npmlink //' | xargs npm install -g --quiet