diff --git a/test/capture_warnings.rb b/test/capture_warnings.rb
index f7ea759b..76e77b7b 100644
--- a/test/capture_warnings.rb
+++ b/test/capture_warnings.rb
@@ -20,7 +20,7 @@ class CaptureWarnings
 
   def after_tests
     stderr_file.rewind
-    lines = stderr_file.read.split("\n").uniq
+    lines = stderr_file.read.split("\n")
     stderr_file.close!
 
     $stderr.reopen(STDERR)