diff --git a/railties/lib/rails/test_unit/reporter.rb b/railties/lib/rails/test_unit/reporter.rb
index e1fe92a11b..de4b002e55 100644
--- a/railties/lib/rails/test_unit/reporter.rb
+++ b/railties/lib/rails/test_unit/reporter.rb
@@ -57,8 +57,14 @@ def fail_fast?
       end
 
       def format_rerun_snippet(result)
-        location, line = result.method(result.name).source_location
-        "#{self.executable} #{relative_path_for(location)}:#{line}"
+        # Try to extract path to assertion from backtrace.
+        if result.location =~ /\[(.*)\]\z/
+          assertion_path = $1
+        else
+          assertion_path = result.method(result.name).source_location.join(':')
+        end
+
+        "#{self.executable} #{relative_path_for(assertion_path)}"
       end
   end
 end
diff --git a/railties/test/application/test_runner_test.rb b/railties/test/application/test_runner_test.rb
index 0aa6ce2252..4965ab7da0 100644
--- a/railties/test/application/test_runner_test.rb
+++ b/railties/test/application/test_runner_test.rb
@@ -344,7 +344,7 @@ def test_output_inline_by_default
       create_test_file :models, 'post', pass: false
 
       output = run_test_command('test/models/post_test.rb')
-      assert_match %r{Running:\n\nPostTest\nF\n\nwups!\n\nbin/rails test test/models/post_test.rb:4}, output
+      assert_match %r{Running:\n\nPostTest\nF\n\nwups!\n\nbin/rails test test/models/post_test.rb:6}, output
     end
 
     def test_only_inline_failure_output