tests: fix arch for platform tests

unit_test/main_tests/conftest.py

@@ -1,3 +1,4 @@
+import platform as platform_module
 import subprocess
 import sys
 from pathlib import Path
@@ -60,6 +61,11 @@ def platform(request, monkeypatch):
     platform_value = request.param
     monkeypatch.setenv('CIBW_PLATFORM', platform_value)
 
+    if platform_value == 'windows':
+        monkeypatch.setattr(platform_module, 'machine', lambda: 'AMD64')
+    else:
+        monkeypatch.setattr(platform_module, 'machine', lambda: 'x86_64')
+
     marker = request.node.get_closest_marker('allow_empty')
     if marker is not None and (len(marker.args) == 0 or platform_value in marker.args):
         def pass_exit(val: int):