diff --git a/test/base_test.rb b/test/base_test.rb
index 7a5d1130..9cb41233 100644
--- a/test/base_test.rb
+++ b/test/base_test.rb
@@ -71,7 +71,7 @@ class BaseTest < Test::Unit::TestCase
     end
 
     it 'exposes the downstream app' do
-      middleware = TestMiddleware.new(app)
+      middleware = TestMiddleware.new!(app)
       assert_same app, middleware.app
     end
 
diff --git a/test/request_test.rb b/test/request_test.rb
index 784dc975..610f1a84 100644
--- a/test/request_test.rb
+++ b/test/request_test.rb
@@ -38,7 +38,7 @@ class RequestTest < Test::Unit::TestCase
       'CONTENT_TYPE' => 'application/x-www-form-urlencoded',
       'rack.input' => StringIO.new('foo=bar')
     )
-    params = Sinatra::Base.new.send(:indifferent_hash).replace(request.params)
+    params = Sinatra::Base.new!.send(:indifferent_hash).replace(request.params)
     dumped = Marshal.dump(request.params)
     assert_equal 'bar', Marshal.load(dumped)['foo']
   end
diff --git a/test/settings_test.rb b/test/settings_test.rb
index 99c66fda..b8c9788c 100644
--- a/test/settings_test.rb
+++ b/test/settings_test.rb
@@ -112,7 +112,7 @@ class SettingsTest < Test::Unit::TestCase
   end
 
   it 'is accessible from instances via #settings' do
-    assert_equal :foo, @base.new.settings.environment
+    assert_equal :foo, @base.new!.settings.environment
   end
 
   it 'is accessible from class via #settings' do
diff --git a/test/sinatra_test.rb b/test/sinatra_test.rb
index 39ea0f6b..a7fe1f37 100644
--- a/test/sinatra_test.rb
+++ b/test/sinatra_test.rb
@@ -12,6 +12,6 @@ class SinatraTest < Test::Unit::TestCase
   end
   
   it "responds to #template_cache" do
-    assert_kind_of Tilt::Cache, Sinatra::Base.new.template_cache
+    assert_kind_of Tilt::Cache, Sinatra::Base.new!.template_cache
   end
 end