diff --git a/test/rbs/collection/sources/git_test.rb b/test/rbs/collection/sources/git_test.rb
index 108f826d8..e567c5bb0 100644
--- a/test/rbs/collection/sources/git_test.rb
+++ b/test/rbs/collection/sources/git_test.rb
@@ -56,6 +56,8 @@ def test_resolved_revision_updated_after_fetch
       git "init", chdir: origin_repo
       git "config", "user.email", "you@example.com", chdir: origin_repo
       git "config", "user.name", "Your Name", chdir: origin_repo
+      # Ignore potential signing key protected by passphrase
+      git "config", "commit.gpgsign", "false", chdir: origin_repo
       git "checkout", "-b", "main", chdir: origin_repo
 
       git "commit", "--allow-empty", "-m", "Initial commit", chdir: origin_repo