diff --git a/.standard.yml b/.standard.yml
index 2e2ba965..fd66eadf 100644
--- a/.standard.yml
+++ b/.standard.yml
@@ -1,5 +1,7 @@
-ruby_version: 2.7
+ruby_version: 2.1
 format: progress
 
 ignore:
   - 'gemfiles/**/*'
+  - 'tasks/**/*'
+  - 'yard/**/*'
\ No newline at end of file
diff --git a/lib/datadog/ci/ext/environment.rb b/lib/datadog/ci/ext/environment.rb
index a27caebc..98ec37e8 100644
--- a/lib/datadog/ci/ext/environment.rb
+++ b/lib/datadog/ci/ext/environment.rb
@@ -557,7 +557,7 @@ def extract_local_git
 
         def branch_or_tag(branch_or_tag)
           branch = tag = nil
-          if branch_or_tag&.include?("tags/")
+          if branch_or_tag && branch_or_tag.include?("tags/")
             tag = branch_or_tag
           else
             branch = branch_or_tag