diff --git a/pylib/gyp/xcode_emulation_test.py b/pylib/gyp/xcode_emulation_test.py
new file mode 100644
index 00000000..98b02320
--- /dev/null
+++ b/pylib/gyp/xcode_emulation_test.py
@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+
+"""Unit tests for the xcode_emulation.py file."""
+
+from gyp.xcode_emulation import XcodeSettings
+import sys
+import unittest
+
+
+class TestXcodeSettings(unittest.TestCase):
+    def setUp(self):
+        if sys.platform != "darwin":
+            self.skipTest("This test only runs on macOS")
+
+    def test_GetCflags(self):
+        target = {
+            "type": "static_library",
+            "configurations": {
+                "Release": {},
+            },
+        }
+        configuration_name = "Release"
+        xcode_settings = XcodeSettings(target)
+        cflags = xcode_settings.GetCflags(configuration_name, "arm64")
+
+        # Do not quote `-arch arm64` with spaces in one string.
+        self.assertEqual(
+            cflags,
+            ["-fasm-blocks", "-mpascal-strings", "-Os", "-gdwarf-2", "-arch", "arm64"],
+        )
+
+    def GypToBuildPath(self, path):
+        return path
+
+    def test_GetLdflags(self):
+        target = {
+            "type": "static_library",
+            "configurations": {
+                "Release": {},
+            },
+        }
+        configuration_name = "Release"
+        xcode_settings = XcodeSettings(target)
+        ldflags = xcode_settings.GetLdflags(
+            configuration_name, "PRODUCT_DIR", self.GypToBuildPath, "arm64"
+        )
+
+        # Do not quote `-arch arm64` with spaces in one string.
+        self.assertEqual(ldflags, ["-arch", "arm64", "-LPRODUCT_DIR"])
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/pyproject.toml b/pyproject.toml
index 0c25d0b3..9dc79419 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ classifiers = [
 ]
 
 [project.optional-dependencies]
-dev = ["flake8", "ruff", "pytest"]
+dev = ["flake8", "ruff == 0.3.0", "pytest"]
 
 [project.scripts]
 gyp = "gyp:script_main"