diff --git a/lib/junit_adapter.rb b/lib/junit_adapter.rb
index 872e26dd..6a6061a0 100644
--- a/lib/junit_adapter.rb
+++ b/lib/junit_adapter.rb
@@ -9,7 +9,7 @@ class JunitAdapter < TestingFrameworkAdapter
 
   def parse_output(output)
     if SUCCESS_REGEXP.match(output[:stdout])
-      {count: $1.to_i, passed: $1.to_i}
+      {count: Regexp.last_match(1).to_i, passed: Regexp.last_match(1).to_i}
     else
       count = COUNT_REGEXP.match(output[:stdout]).try(:captures).try(:first).try(:to_i) || 0
       failed = FAILURES_REGEXP.match(output[:stdout]).try(:captures).try(:first).try(:to_i) || 0
diff --git a/lib/whistleblower.rb b/lib/whistleblower.rb
index 7906a0b4..5d5102cf 100644
--- a/lib/whistleblower.rb
+++ b/lib/whistleblower.rb
@@ -10,7 +10,7 @@ class Whistleblower
 
   def generate_hint(stderr)
     if hint = find_hint(stderr)
-      hint.message.gsub(PLACEHOLDER_REGEXP) { @matches[$1.to_i] }
+      hint.message.gsub(PLACEHOLDER_REGEXP) { @matches[Regexp.last_match(1).to_i] }
     end
   end