diff --git a/tests/unit/utils/test_platform.py b/tests/unit/utils/test_platform.py
index 3cbd026..0635014 100644
--- a/tests/unit/utils/test_platform.py
+++ b/tests/unit/utils/test_platform.py
@@ -144,14 +144,16 @@ def test_is_not_aix():
 
 def test_is_aarch64_arm64():
     return_value = True
+    print(f"DGM test_is_aarch64_arm64, expected return value '{return_value}'", flush=True)
     # Allow for MacOS Arm64 platform returns 'arm64' not 'aarch64', different than Linux
     with mock.patch("platform.machine", return_value="arm64"):
-        with mock.patch("sys.platform", return_value="darwin"):
+        with mock.patch("sys.platform", new_callable=mock.PropertyMock(return_value="darwin")):
             assert pytestskipmarkers.utils.platform.is_aarch64() is return_value
 
 
 def test_is_aarch64_aarch64():
     return_value = True
+    print(f"DGM test_is_aarch64_aarch64, expected return value '{return_value}'", flush=True)
     # Allow for MacOS Arm64 platform returns 'arm64' not 'aarch64', different than Linux
     with mock.patch("platform.machine", return_value="aarch64"):
         with mock.patch("sys.platform", return_value="not_darwin"):
@@ -160,6 +162,7 @@ def test_is_aarch64_aarch64():
 
 def test_is_not_aarch64():
     return_value = False
+    print(f"DGM test_is_not_aarch64, expected return value '{return_value}'", flush=True)
     with mock.patch("platform.machine", return_value="not_arm64"):
         with mock.patch("sys.platform", return_value="darwin"):
             assert pytestskipmarkers.utils.platform.is_aarch64() is return_value
@@ -167,6 +170,10 @@ def test_is_not_aarch64():
 
 def test_is_not_aarch64_string_aarch64():
     return_value = False
+    print(
+        f"DGM test_is_not_aarch64_string_aarch64, expected return value '{return_value}'",
+        flush=True,
+    )
     with mock.patch("platform.machine", return_value="not_aarch64"):
         assert pytestskipmarkers.utils.platform.is_aarch64() is return_value