1 files changed, 7 insertions, 17 deletions
diff --git a/activesupport/test/test_test.rb b/activesupport/test/test_test.rb
index 44fe648710..0f93c8b59e 100644
--- a/activesupport/test/test_test.rb
+++ b/activesupport/test/test_test.rb
@@ -16,24 +16,14 @@ class AssertDifferenceTest < ActiveSupport::TestCase
   end
 
   def test_assert_not
-    assert_not nil
-    assert_not false
-
-    begin
-      assert_not true
-    rescue Exception => e
-      assert_equal 'Expected true to be nil or false', e.message
-    else
-      fail 'assert_not true should fail'
-    end
+    assert_equal true, assert_not(nil)
+    assert_equal true, assert_not(false)
 
-    begin
-      assert_not true, 'custom'
-    rescue Exception => e
-      assert_equal 'custom', e.message
-    else
-      fail 'assert_not true should fail'
-    end
+    e = assert_raises(MiniTest::Assertion) { assert_not true }
+    assert_equal 'Expected true to be nil or false', e.message
+
+    e = assert_raises(MiniTest::Assertion) { assert_not true, 'custom' }
+    assert_equal 'custom', e.message
   end
 
   def test_assert_no_difference