diff --git a/.github/workflows/deno.yml b/.github/workflows/deno.yml
index 024f006..ae9cae0 100644
--- a/.github/workflows/deno.yml
+++ b/.github/workflows/deno.yml
@@ -21,7 +21,8 @@ jobs:
           deno-version: v1.x
       # Check if the code is formatted according to Deno's default
       # formatting conventions.
-      - run: deno fmt --check
+      - if: matrix.os == 'ubuntu-20.04'
+        run: deno fmt --check
 
       # Scan the code for syntax errors and style issues. If
       # you want to use a custom linter configuration you can add a configuration file with --config <myconfig>