diff --git a/src/dependency_injector/providers.c b/src/dependency_injector/providers.c
index c6750c17..4bf5471a 100644
--- a/src/dependency_injector/providers.c
+++ b/src/dependency_injector/providers.c
@@ -22558,7 +22558,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Callable_6set_provid
  *         """Set provider's provides."""
  *         if provides and not callable(provides):             # <<<<<<<<<<<<<<
  *             raise Error(
- *                 f'Provider {self.__class__.__qualname__} expected to get callable, '
+ *                 f'Provider {_class_qualname(self)} expected to get callable, '
  */
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@@ -22576,7 +22576,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Callable_6set_provid
  *         """Set provider's provides."""
  *         if provides and not callable(provides):
  *             raise Error(             # <<<<<<<<<<<<<<
- *                 f'Provider {self.__class__.__qualname__} expected to get callable, '
+ *                 f'Provider {_class_qualname(self)} expected to get callable, '
  *                 f'got {provides} instead'
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@@ -22585,7 +22585,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Callable_6set_provid
     /* "dependency_injector/providers.pyx":1075
  *         if provides and not callable(provides):
  *             raise Error(
- *                 f'Provider {self.__class__.__qualname__} expected to get callable, '             # <<<<<<<<<<<<<<
+ *                 f'Provider {_class_qualname(self)} expected to get callable, '             # <<<<<<<<<<<<<<
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  */
@@ -22597,19 +22597,16 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_8Callable_6set_provid
     __pyx_t_7 += 9;
     __Pyx_GIVEREF(__pyx_kp_u_Provider_2);
     PyTuple_SET_ITEM(__pyx_t_6, 0, __pyx_kp_u_Provider_2);
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+    __pyx_t_9 = __pyx_f_19dependency_injector_9providers__class_qualname(((PyObject *)__pyx_v_self), 0); if (unlikely(!__pyx_t_9)) __PYX_ERR(1, 1075, __pyx_L1_error)
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  *             raise Error(
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  *         if provides and not callable(provides):
  *             raise Error(
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  *         if provides and not callable(provides):             # <<<<<<<<<<<<<<
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  *                 not issubclass(provides, self.__class__.provided_type)):
  *             raise Error(             # <<<<<<<<<<<<<<
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     __pyx_t_8 = 127;
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     __Pyx_INCREF(__pyx_kp_u_can_provide_only);
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     /* "dependency_injector/providers.pyx":2507
  *             raise Error(
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-    __pyx_t_10 = __Pyx_PyObject_GetAttrStr(__pyx_t_9, __pyx_n_s_provided_type); if (unlikely(!__pyx_t_10)) __PYX_ERR(1, 2507, __pyx_L1_error)
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-    __Pyx_GIVEREF(__pyx_t_9);
-    PyTuple_SET_ITEM(__pyx_t_6, 2, __pyx_t_9);
-    __pyx_t_9 = 0;
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+    __Pyx_GOTREF(__pyx_t_10);
+    __Pyx_DECREF(__pyx_t_9); __pyx_t_9 = 0;
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+    __pyx_t_7 += __Pyx_PyUnicode_GET_LENGTH(__pyx_t_10);
+    __Pyx_GIVEREF(__pyx_t_10);
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@@ -49260,12 +49251,12 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_13BaseSingleton_6set_
     /* "dependency_injector/providers.pyx":2506
  *                 not issubclass(provides, self.__class__.provided_type)):
  *             raise Error(
- *                 f'{self.__class__.__qualname__} can provide only '             # <<<<<<<<<<<<<<
+ *                 f'{_class_qualname(self)} can provide only '             # <<<<<<<<<<<<<<
  *                 f'{self.__class__.provided_type} instances'
  *             )
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-    __Pyx_GOTREF(__pyx_t_9);
+    __pyx_t_10 = __Pyx_PyUnicode_Join(__pyx_t_6, 4, __pyx_t_7, __pyx_t_8); if (unlikely(!__pyx_t_10)) __PYX_ERR(1, 2506, __pyx_L1_error)
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     __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
     __pyx_t_6 = NULL;
     if (CYTHON_UNPACK_METHODS && unlikely(PyMethod_Check(__pyx_t_4))) {
@@ -49277,9 +49268,9 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_13BaseSingleton_6set_
         __Pyx_DECREF_SET(__pyx_t_4, function);
       }
     }
-    __pyx_t_3 = (__pyx_t_6) ? __Pyx_PyObject_Call2Args(__pyx_t_4, __pyx_t_6, __pyx_t_9) : __Pyx_PyObject_CallOneArg(__pyx_t_4, __pyx_t_9);
+    __pyx_t_3 = (__pyx_t_6) ? __Pyx_PyObject_Call2Args(__pyx_t_4, __pyx_t_6, __pyx_t_10) : __Pyx_PyObject_CallOneArg(__pyx_t_4, __pyx_t_10);
     __Pyx_XDECREF(__pyx_t_6); __pyx_t_6 = 0;
-    __Pyx_DECREF(__pyx_t_9); __pyx_t_9 = 0;
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@@ -49305,18 +49296,18 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_13BaseSingleton_6set_
  */
   __pyx_t_4 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self->__pyx___instantiator), __pyx_n_s_set_provides); if (unlikely(!__pyx_t_4)) __PYX_ERR(1, 2509, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_4);
-  __pyx_t_9 = NULL;
+  __pyx_t_10 = NULL;
   if (CYTHON_UNPACK_METHODS && likely(PyMethod_Check(__pyx_t_4))) {
-    __pyx_t_9 = PyMethod_GET_SELF(__pyx_t_4);
-    if (likely(__pyx_t_9)) {
+    __pyx_t_10 = PyMethod_GET_SELF(__pyx_t_4);
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       PyObject* function = PyMethod_GET_FUNCTION(__pyx_t_4);
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-  __pyx_t_3 = (__pyx_t_9) ? __Pyx_PyObject_Call2Args(__pyx_t_4, __pyx_t_9, __pyx_v_provides) : __Pyx_PyObject_CallOneArg(__pyx_t_4, __pyx_v_provides);
-  __Pyx_XDECREF(__pyx_t_9); __pyx_t_9 = 0;
+  __pyx_t_3 = (__pyx_t_10) ? __Pyx_PyObject_Call2Args(__pyx_t_4, __pyx_t_10, __pyx_v_provides) : __Pyx_PyObject_CallOneArg(__pyx_t_4, __pyx_v_provides);
+  __Pyx_XDECREF(__pyx_t_10); __pyx_t_10 = 0;
   if (unlikely(!__pyx_t_3)) __PYX_ERR(1, 2509, __pyx_L1_error)
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diff --git a/src/dependency_injector/providers.pyx b/src/dependency_injector/providers.pyx
index 1fc73e96..999c7bf6 100644
--- a/src/dependency_injector/providers.pyx
+++ b/src/dependency_injector/providers.pyx
@@ -1072,7 +1072,7 @@ cdef class Callable(Provider):
         """Set provider's provides."""
         if provides and not callable(provides):
             raise Error(
-                f'Provider {self.__class__.__qualname__} expected to get callable, '
+                f'Provider {_class_qualname(self)} expected to get callable, '
                 f'got {provides} instead'
             )
         self.__provides = provides
@@ -2138,7 +2138,7 @@ cdef class Factory(Provider):
                 and self.__class__.provided_type and
                 not issubclass(provides, self.__class__.provided_type)):
             raise Error(
-                f'{self.__class__.__qualname__} can provide only '
+                f'{_class_qualname(self)} can provide only '
                 f'{self.__class__.provided_type} instances'
             )
         self.__instantiator.set_provides(provides)
@@ -2503,7 +2503,7 @@ cdef class BaseSingleton(Provider):
                 and self.__class__.provided_type and
                 not issubclass(provides, self.__class__.provided_type)):
             raise Error(
-                f'{self.__class__.__qualname__} can provide only '
+                f'{_class_qualname(self)} can provide only '
                 f'{self.__class__.provided_type} instances'
             )
         self.__instantiator.set_provides(provides)