diff --git a/spec/runtime/inline_spec.rb b/spec/runtime/inline_spec.rb
index 718b896ecb4..77d3fcbed22 100644
--- a/spec/runtime/inline_spec.rb
+++ b/spec/runtime/inline_spec.rb
@@ -89,7 +89,6 @@ def script(code, options = {})
 
     expect(out).to include("Installing activesupport")
     err_lines = err.split("\n")
-    err_lines.reject!{|line| line =~ /\.rb:\d+: warning: / }
     expect(err_lines).to be_empty
     expect(exitstatus).to be_zero if exitstatus
   end