diff --git a/test/test_configoptions.py b/test/test_configoptions.py
index 8eaf48e..52d203f 100644
--- a/test/test_configoptions.py
+++ b/test/test_configoptions.py
@@ -1,3 +1,4 @@
+import os
 from pathlib import Path
 from pprint import pprint
 
@@ -596,7 +597,7 @@ def test_real_config_inherit_cross_cmake():
                     "cmake": {
                         "build_type": "Release",
                         "generator": "Ninja",
-                        "source_path": "/project/src",
+                        "source_path": os.path.normpath("/project/src"),
                         "args": ["arg1", "arg2"],
                         "env": {
                             "foo": "bar"
@@ -611,7 +612,7 @@ def test_real_config_inherit_cross_cmake():
                         "cmake": {
                             "build_type": "RelWithDebInfo",
                             "generator": "Unix Makefiles",
-                            "source_path": "/project/src",
+                            "source_path": os.path.normpath("/project/src"),
                             "args": ["arg1", "arg2", "arg3", "arg4"],
                             "env": {
                                 "foo": "bar",
@@ -623,7 +624,7 @@ def test_real_config_inherit_cross_cmake():
                         "cmake": {
                             "build_type": "Release",
                             "generator": "Ninja",
-                            "source_path": "/project/src",
+                            "source_path": os.path.normpath("/project/src"),
                             "args": ["arg1", "arg2"],
                             "env": {
                                 "foo": "bar"
@@ -635,7 +636,7 @@ def test_real_config_inherit_cross_cmake():
                         "cmake": {
                             "build_type": "Release",
                             "generator": "Ninja",
-                            "source_path": "/project/src",
+                            "source_path": os.path.normpath("/project/src"),
                             "args": ["arg1", "arg2"],
                             "env": {
                                 "foo": "bar"
@@ -647,7 +648,7 @@ def test_real_config_inherit_cross_cmake():
                         "cmake": {
                             "build_type": "Release",
                             "generator": "Ninja",
-                            "source_path": "/project/src",
+                            "source_path": os.path.normpath("/project/src"),
                             "args": ["arg1", "arg2"],
                             "env": {
                                 "foo": "bar"
@@ -671,7 +672,7 @@ def test_real_config_inherit_cross_cmake():
                 "py-build-cmake": {
                     "module": {
                         "name": "foobar",
-                        "directory": "/project",
+                        "directory": os.path.normpath("/project"),
                     },
                     "sdist": {
                         "include": [],
@@ -681,7 +682,7 @@ def test_real_config_inherit_cross_cmake():
                         "build_type": "Release",
                         "config": ["Release"],
                         "generator": "Ninja",
-                        "source_path": "/project/src",
+                        "source_path": os.path.normpath("/project/src"),
                         "build_path": ".py-build-cmake_cache",
                         "options": {},
                         "args": ["arg1", "arg2"],
@@ -707,7 +708,7 @@ def test_real_config_inherit_cross_cmake():
                             "build_type": "RelWithDebInfo",
                             "config": ["RelWithDebInfo"],
                             "generator": "Unix Makefiles",
-                            "source_path": "/project/src",
+                            "source_path": os.path.normpath("/project/src"),
                             "build_path": ".py-build-cmake_cache",
                             "options": {},
                             "args": ["arg1", "arg2", "arg3", "arg4"],
@@ -730,7 +731,7 @@ def test_real_config_inherit_cross_cmake():
                             "build_type": "Release",
                             "config": ["Release"],
                             "generator": "Ninja",
-                            "source_path": "/project/src",
+                            "source_path": os.path.normpath("/project/src"),
                             "build_path": ".py-build-cmake_cache",
                             "options": {},
                             "args": ["arg1", "arg2"],
@@ -752,7 +753,7 @@ def test_real_config_inherit_cross_cmake():
                             "build_type": "Release",
                             "config": ["Release"],
                             "generator": "Ninja",
-                            "source_path": "/project/src",
+                            "source_path": os.path.normpath("/project/src"),
                             "build_path": ".py-build-cmake_cache",
                             "options": {},
                             "args": ["arg1", "arg2"],
@@ -774,7 +775,7 @@ def test_real_config_inherit_cross_cmake():
                             "build_type": "Release",
                             "config": ["Release"],
                             "generator": "Ninja",
-                            "source_path": "/project/src",
+                            "source_path": os.path.normpath("/project/src"),
                             "build_path": ".py-build-cmake_cache",
                             "options": {},
                             "args": ["arg1", "arg2"],
@@ -842,7 +843,7 @@ def test_real_config_no_cross():
                 "py-build-cmake": {
                     "module": {
                         "name": "foobar",
-                        "directory": "/project",
+                        "directory": os.path.normpath("/project"),
                     },
                     "sdist": {
                         "include": [],
@@ -852,7 +853,7 @@ def test_real_config_no_cross():
                         "build_type": "Release",
                         "config": ["Release"],
                         "generator": "Ninja",
-                        "source_path": "/project/src",
+                        "source_path": os.path.normpath("/project/src"),
                         "build_path": ".py-build-cmake_cache",
                         "options": {},
                         "args": ["arg1", "arg2"],
@@ -873,7 +874,7 @@ def test_real_config_no_cross():
                             "build_type": "Release",
                             "config": ["Release"],
                             "generator": "Ninja",
-                            "source_path": "/project/src",
+                            "source_path": os.path.normpath("/project/src"),
                             "build_path": ".py-build-cmake_cache",
                             "options": {},
                             "args": ["arg1", "arg2"],
@@ -895,7 +896,7 @@ def test_real_config_no_cross():
                             "build_type": "Release",
                             "config": ["Release"],
                             "generator": "Ninja",
-                            "source_path": "/project/src",
+                            "source_path": os.path.normpath("/project/src"),
                             "build_path": ".py-build-cmake_cache",
                             "options": {},
                             "args": ["arg1", "arg2"],
@@ -917,7 +918,7 @@ def test_real_config_no_cross():
                             "build_type": "Release",
                             "config": ["Release"],
                             "generator": "Ninja",
-                            "source_path": "/project/src",
+                            "source_path": os.path.normpath("/project/src"),
                             "build_path": ".py-build-cmake_cache",
                             "options": {},
                             "args": ["arg1", "arg2"],
@@ -965,7 +966,7 @@ def test_real_config_no_cmake():
                 "py-build-cmake": {
                     "module": {
                         "name": "foobar",
-                        "directory": "/project",
+                        "directory": os.path.normpath("/project"),
                     },
                     "sdist": {
                         "include": [],
@@ -1030,7 +1031,7 @@ def test_real_config_local_override():
                 "py-build-cmake": {
                     "module": {
                         "name": "foobar",
-                        "directory": "/project",
+                        "directory": os.path.normpath("/project"),
                     },
                     "sdist": {
                         "include": ["somefile*"],
@@ -1104,7 +1105,7 @@ def test_real_config_local_override_windows():
                 "py-build-cmake": {
                     "module": {
                         "name": "foobar",
-                        "directory": "/project",
+                        "directory": os.path.normpath("/project"),
                     },
                     "sdist": {
                         "include": [],