diff --git a/test/real/minitest_rerun_failed_test.rb b/test/real/minitest_rerun_failed_test.rb
index ec96094..5a4d162 100644
--- a/test/real/minitest_rerun_failed_test.rb
+++ b/test/real/minitest_rerun_failed_test.rb
@@ -75,15 +75,15 @@ def test_it_succeeds
   end
 
   def test_that_it_has_a_version_number
-    assert_not_nil ::MinitestRerunFailed::VERSION
+    refute ::MinitestRerunFailed::VERSION.nil?
   end
 
   def test_it_writes_failed_tests_to_stdout
-    assert_not_empty fail_self_console_output
+    refute fail_self_console_output.nil?
   end
 
   def test_it_writes_failed_tests_to_file
-    assert_not_empty fail_self_file_output
+    refute fail_self_file_output.nil?
   end
 
   def test_it_prints_failed_tests_with_seed