1 files changed, 12 insertions, 0 deletions
diff --git a/railties/test/commands/server_test.rb b/railties/test/commands/server_test.rb
index 2d1f071969..7731d10d9b 100644
--- a/railties/test/commands/server_test.rb
+++ b/railties/test/commands/server_test.rb
@@ -140,6 +140,18 @@ class Rails::ServerTest < ActiveSupport::TestCase
   end
 
   def test_argument_precedence_over_environment_variable
+    switch_env "PORT", "1234" do
+      args = ["-p", "5678"]
+      options = parse_arguments(args)
+      assert_equal 5678, options[:Port]
+    end
+
+    switch_env "PORT", "1234" do
+      args = ["-p", "3000"]
+      options = parse_arguments(args)
+      assert_equal 3000, options[:Port]
+    end
+
     switch_env "HOST", "1.2.3.4" do
       args = ["-b", "127.0.0.1"]
       options = parse_arguments(args)