diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 40c7d27..79023cb 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,7 +7,7 @@
 name: Check the IVOA document
 
 env:
-  doc_name:
+  doc_name: ObscoreTimeExtension
 
 on:
   pull_request: