diff --git a/.github/workflows/run_all.yml b/.github/workflows/run_all.yml
index 7251d75..6706aeb 100644
--- a/.github/workflows/run_all.yml
+++ b/.github/workflows/run_all.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.5", "3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]
 
     steps:
       - uses: actions/checkout@v3
@@ -22,11 +22,13 @@ jobs:
           pip install poetry
           poetry install
       - name: Lint
+        if: matrix.python-version == '3.11'
         run: |
           poetry run ruff --format=github wireup
       - name: Check formatting
+        if: matrix.python-version == '3.11'
         run: |
           poetry run black --check .
       - name: Run tests
         run: |
-          python -m unittest discover -s test/
\ No newline at end of file
+          python -m unittest discover -s test/
diff --git a/wireup/ioc/dependency_container.py b/wireup/ioc/dependency_container.py
index 5ddd1f0..5ef1405 100644
--- a/wireup/ioc/dependency_container.py
+++ b/wireup/ioc/dependency_container.py
@@ -201,7 +201,8 @@ def __callable_get_params_to_inject(self, fn: Callable[..., Any], klass: type[__
 
         values_from_parameters = {}
         for name, parameter in inspect.signature(fn).parameters.items():
-            if obj := self.__get_container_dependency_or_param(parameter):
+            obj = self.__get_container_dependency_or_param(parameter)
+            if obj:
                 values_from_parameters[name] = obj
 
         args = {**params_from_context, **values_from_parameters}
@@ -217,8 +218,9 @@ def __get(self, klass: type[__T], qualifier: ContainerProxyQualifierValue) -> __
 
         self.__assert_dependency_exists(klass, qualifier)
         class_to_initialize = klass
-        if klass in self.__known_interfaces:  # noqa: SIM102
-            if concrete_class := self.__get_concrete_class_from_interface_and_qualifier(klass, qualifier):
+        if self.__is_interface_known(klass):
+            concrete_class = self.__get_concrete_class_from_interface_and_qualifier(klass, qualifier)
+            if concrete_class:
                 class_to_initialize = concrete_class
 
         if self.__is_impl_known_from_factory(class_to_initialize):