diff --git a/entrypoint.rb b/entrypoint.rb
index 5d371d2..4475aa5 100755
--- a/entrypoint.rb
+++ b/entrypoint.rb
@@ -10,7 +10,7 @@
 verbose = ENV["VERBOSE"]
 wait = ENV["WAIT_INTERVAL"]
 workflow_name = ENV["RUNNING_WORKFLOW_NAME"]
-api_endpoint = ENV['API_ENDPOINT'] || 'https://api.github.com'
+api_endpoint = ENV.fetch("API_ENDPOINT", "").strip.empty? ? "https://api.github.com" : ENV["API_ENDPOINT"]
 
 GithubChecksVerifier.configure do |config|
   config.allowed_conclusions = allowed_conclusions.split(",").map(&:strip)