diff --git a/modules/openapi-generator/src/main/resources/python-aiohttp/conftest.mustache b/modules/openapi-generator/src/main/resources/python-aiohttp/conftest.mustache
index a48d0bec621..c0fd51198d7 100644
--- a/modules/openapi-generator/src/main/resources/python-aiohttp/conftest.mustache
+++ b/modules/openapi-generator/src/main/resources/python-aiohttp/conftest.mustache
@@ -11,8 +11,12 @@ def client(loop, aiohttp_client):
     options = {
         "swagger_ui": True
         }
-    specification_dir = os.path.join(os.path.dirname(__file__), '..',{{#pythonSrcRoot}}
-                                     "{{{.}}}",{{/pythonSrcRoot}}
+    specification_dir = os.path.join(os.path.dirname(__file__), '..',
+                                     {{#lambda.forwardslash}}
+                                     {{#pythonSrcRoot}}
+                                     "{{{.}}}",
+                                     {{/pythonSrcRoot}}
+                                     {{/lambda.forwardslash}}
                                      '{{packageName}}',
                                      'openapi')
     app = connexion.AioHttpApp(__name__, specification_dir=specification_dir,
diff --git a/modules/openapi-generator/src/main/resources/python-aiohttp/setup.mustache b/modules/openapi-generator/src/main/resources/python-aiohttp/setup.mustache
index 706eab4f505..da337c71feb 100644
--- a/modules/openapi-generator/src/main/resources/python-aiohttp/setup.mustache
+++ b/modules/openapi-generator/src/main/resources/python-aiohttp/setup.mustache
@@ -27,9 +27,13 @@ setup(
     url="{{packageUrl}}",
     keywords=["OpenAPI", "{{appName}}"],
     install_requires=REQUIRES,
-    packages=find_packages({{#pythonSrcRoot}}"{{{.}}}"{{/pythonSrcRoot}}),{{#pythonSrcRoot}}
-    package_dir={"": "{{{.}}}"},{{/pythonSrcRoot}}
-    package_data={'': ['{{#pythonSrcRoot}}{{{.}}}/{{/pythonSrcRoot}}openapi/openapi.yaml']},
+    packages=find_packages({{#lambda.forwardslash}}{{#pythonSrcRoot}}"{{{.}}}"{{/pythonSrcRoot}}){{/lambda.forwardslash}},
+    {{#lambda.forwardslash}}
+    {{#pythonSrcRoot}}
+    package_dir={"": "{{{.}}}"},
+    {{/pythonSrcRoot}}
+    {{/lambda.forwardslash}}
+    package_data={'': ['{{#lambda.forwardslash}}{{#pythonSrcRoot}}{{{.}}}/{{/pythonSrcRoot}}{{/lambda.forwardslash}}openapi/openapi.yaml']},
     include_package_data=True,
     entry_points={
         'console_scripts': ['{{packageName}}={{packageName}}.__main__:main']},
diff --git a/modules/openapi-generator/src/main/resources/python-aiohttp/tox.mustache b/modules/openapi-generator/src/main/resources/python-aiohttp/tox.mustache
index 76e368c2393..dfebe7024ae 100644
--- a/modules/openapi-generator/src/main/resources/python-aiohttp/tox.mustache
+++ b/modules/openapi-generator/src/main/resources/python-aiohttp/tox.mustache
@@ -8,4 +8,4 @@ deps=-r{toxinidir}/requirements.txt
 	 {toxinidir}
 
 commands=
-   {{^useNose}}pytest --cov={{{pythonSrcRoot}}}{{{packageName}}}{{/useNose}}{{#useNose}}nosetests{{/useNose}}
+   {{^useNose}}pytest --cov={{#lambda.forwardslash}}{{{pythonSrcRoot}}}{{/lambda.forwardslash}}{{{packageName}}}{{/useNose}}{{#useNose}}nosetests{{/useNose}}
diff --git a/samples/server/petstore/python-aiohttp-srclayout/setup.py b/samples/server/petstore/python-aiohttp-srclayout/setup.py
index 5cfff33cdbe..44d2608152a 100644
--- a/samples/server/petstore/python-aiohttp-srclayout/setup.py
+++ b/samples/server/petstore/python-aiohttp-srclayout/setup.py
@@ -29,7 +29,7 @@ setup(
     install_requires=REQUIRES,
     packages=find_packages("src/"),
     package_dir={"": "src/"},
-    package_data={'': ['src//openapi/openapi.yaml']},
+    package_data={'': ['src/openapi/openapi.yaml']},
     include_package_data=True,
     entry_points={
         'console_scripts': ['openapi_server=openapi_server.__main__:main']},