diff --git a/cibuildwheel/macos.py b/cibuildwheel/macos.py
index 23304844..7aed4c1a 100644
--- a/cibuildwheel/macos.py
+++ b/cibuildwheel/macos.py
@@ -81,8 +81,8 @@ def get_python_configurations(build_selector: BuildSelector,
     # skip builds as required by BUILD/SKIP
     python_configurations = [c for c in python_configurations if build_selector(c.identifier)]
 
-    # When running on macOS 11 in x86_64 mode, the reported OS is the
-    # non-existent '10.16'.
+    # When running on macOS 11 and x86_64, the reported OS is '10.16', but
+    # there is no such OS - it really means macOS 11.
     if get_macos_version() >= (10, 16):
         if any(c.identifier.startswith('pp') for c in python_configurations):
             # pypy doesn't work on macOS 11 yet
diff --git a/test/utils.py b/test/utils.py
index 369e95a7..e9b48e19 100644
--- a/test/utils.py
+++ b/test/utils.py
@@ -117,8 +117,8 @@ def expected_wheels(package_name, package_version, manylinux_versions=None,
             python_abi_tags.append('cp27-cp27mu')  # python 2.7 has 2 different ABI on manylinux
 
     if platform == 'macos' and get_macos_version() >= (10, 16):
-        # CPython 3.5 doesn't work on macOS 11.
         # 10.16 is sometimes reported as the macOS version on macOS 11.
+        # CPython 3.5 doesn't work on macOS 11.
         python_abi_tags.remove('cp35-cp35m')
         # pypy not supported on macOS 11.
         python_abi_tags = [t for t in python_abi_tags if not t.startswith('pp')]