3 files changed, 9 insertions, 3 deletions
diff --git a/actionpack/test/dispatch/content_security_policy_test.rb b/actionpack/test/dispatch/content_security_policy_test.rb
index c4c7f53903..4f9a4ff2bd 100644
--- a/actionpack/test/dispatch/content_security_policy_test.rb
+++ b/actionpack/test/dispatch/content_security_policy_test.rb
@@ -116,6 +116,12 @@ class ContentSecurityPolicyTest < ActiveSupport::TestCase
     @policy.object_src false
     assert_no_match %r{object-src}, @policy.build
 
+    @policy.prefetch_src :self
+    assert_match %r{prefetch-src 'self'}, @policy.build
+
+    @policy.prefetch_src false
+    assert_no_match %r{prefetch-src}, @policy.build
+
     @policy.script_src :self
     assert_match %r{script-src 'self'}, @policy.build
 
diff --git a/actionpack/test/dispatch/response_test.rb b/actionpack/test/dispatch/response_test.rb
index 6d87314e97..0f37d074af 100644
--- a/actionpack/test/dispatch/response_test.rb
+++ b/actionpack/test/dispatch/response_test.rb
@@ -158,7 +158,7 @@ class ResponseTest < ActiveSupport::TestCase
       @response.status = c.to_s
       @response.set_header "Content-Length", "0"
       _, headers, _ = @response.to_a
-      assert !headers.has_key?("Content-Length"), "#{c} must not have a Content-Length header field"
+      assert_not headers.has_key?("Content-Length"), "#{c} must not have a Content-Length header field"
     end
   end
 
@@ -177,7 +177,7 @@ class ResponseTest < ActiveSupport::TestCase
       @response = ActionDispatch::Response.new
       @response.status = c.to_s
       _, headers, _ = @response.to_a
-      assert !headers.has_key?("Content-Type"), "#{c} should not have Content-Type header"
+      assert_not headers.has_key?("Content-Type"), "#{c} should not have Content-Type header"
     end
 
     [200, 302, 404, 500].each do |c|
diff --git a/actionpack/test/dispatch/routing_test.rb b/actionpack/test/dispatch/routing_test.rb
index dd6adcbfd1..5efbe5b553 100644
--- a/actionpack/test/dispatch/routing_test.rb
+++ b/actionpack/test/dispatch/routing_test.rb
@@ -3153,7 +3153,7 @@ class TestRoutingMapper < ActionDispatch::IntegrationTest
       after = has_named_route?(:hello)
     end
 
-    assert !before, "expected to not have named route :hello before route definition"
+    assert_not before, "expected to not have named route :hello before route definition"
     assert after, "expected to have named route :hello after route definition"
   end