diff --git a/test/integration/timeoutable_test.rb b/test/integration/timeoutable_test.rb
index d7e31ba6..73c716e6 100644
--- a/test/integration/timeoutable_test.rb
+++ b/test/integration/timeoutable_test.rb
@@ -191,7 +191,9 @@ class SessionTimeoutTest < Devise::IntegrationTest
   test 'does not crash when the last_request_at is a String' do
     user = sign_in_as_user
 
-    get edit_form_user_path(user, last_request_at: Time.now.utc.to_s)
-    get users_path
+    assert_nothing_raised do
+      get edit_form_user_path(user, last_request_at: Time.now.utc.to_s)
+      get users_path
+    end
   end
 end
diff --git a/test/models_test.rb b/test/models_test.rb
index 16acb92c..e2aced9e 100644
--- a/test/models_test.rb
+++ b/test/models_test.rb
@@ -90,7 +90,7 @@ class ActiveRecordTest < ActiveSupport::TestCase
       def send_devise_notification(*); end
     end
 
-    klass.create!
+    assert_nothing_raised { klass.create! }
   end
 end
 
diff --git a/test/test/controller_helpers_test.rb b/test/test/controller_helpers_test.rb
index 7ba9f3c6..a158e875 100644
--- a/test/test/controller_helpers_test.rb
+++ b/test/test/controller_helpers_test.rb
@@ -112,7 +112,7 @@ class TestControllerHelpersTest < Devise::ControllerTestCase
   end
 
   test "defined Warden after_authentication callback should not be called when sign_in is called" do
-    begin
+    assert_nothing_raised do
       Warden::Manager.after_authentication do |user, auth, opts|
         flunk "callback was called while it should not"
       end
@@ -126,7 +126,7 @@ class TestControllerHelpersTest < Devise::ControllerTestCase
   end
 
   test "defined Warden before_logout callback should not be called when sign_out is called" do
-    begin
+    assert_nothing_raised do
       Warden::Manager.before_logout do |user, auth, opts|
         flunk "callback was called while it should not"
       end