diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index feb08f328b..4690e1e650 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -297,7 +297,7 @@ jobs:
           # RSpec split test files by test examples feature - it's optional
           # https://knapsackpro.com/faq/question/how-to-split-slow-rspec-test-files-by-test-examples-by-individual-it
           #KNAPSACK_PRO_RSPEC_SPLIT_BY_TEST_EXAMPLES: true
-          KNAPSACK_PRO_TEST_FILE_PATTERN: "{spec/lib/**/*_spec.rb, spec/migrations/**/*_spec.rb, spec/serializers/**/*_spec.rb, engines/**/*_spec.rb}"
+          KNAPSACK_PRO_TEST_FILE_PATTERN: "{spec/lib/**/*_spec.rb,spec/migrations/**/*_spec.rb,spec/serializers/**/*_spec.rb,engines/**/*_spec.rb}"
 
         run: |
           bundle exec rake knapsack_pro:rspec