Gemfile in standard-performance-1.1.2 vs Gemfile in standard-performance-1.2.0

@@ -3,6 +3,10 @@
 gemspec
 gem "rake"
 gem "minitest"
 gem "standard"
 gem "m"
-gem "mocktail"
+
+# Remove branch after 2.7 is dropped
+if RUBY_VERSION > "3"
+  gem "mocktail"
+end