diff --git a/netlify.toml b/netlify.toml
index 6eb05a8b..7a5a64a2 100644
--- a/netlify.toml
+++ b/netlify.toml
@@ -3,4 +3,10 @@
   command = "bin/setup-runtime && export PATH=\"$(pwd)/bin:$PATH\" && php --version && npm run docs:build"
 
 [context.deploy-preview]
-  ignore = "curl -s -H \"Authorization: token $GITHUB_PAT\" https://api.github.com/repos/:owner/:repo/pulls/$REVIEW_ID | grep '\"documentation\"'"
+  ignore = """
+  curl -s -H "Authorization: token $GITHUB_PAT" \
+    https://api.github.com/repos/$REPOSITORY/pulls/$REVIEW_ID \
+    | grep -q '"documentation"' || exit 0
+
+  exit 1
+  """