diff --git a/src/dependency_injector/providers.c b/src/dependency_injector/providers.c
index ef016584..3375f543 100644
--- a/src/dependency_injector/providers.c
+++ b/src/dependency_injector/providers.c
@@ -31149,11 +31149,11 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_20ThreadLocalSingleto
   /* "dependency_injector/providers.pyx":1811
  *         :rtype: None
  *         """
- *         self.__storage.instance = None             # <<<<<<<<<<<<<<
+ *         del self.__storage.instance             # <<<<<<<<<<<<<<
  * 
  *     cpdef object _provide(self, tuple args, dict kwargs):
  */
-  if (__Pyx_PyObject_SetAttrStr(__pyx_v_self->__pyx___storage, __pyx_n_s_instance, Py_None) < 0) __PYX_ERR(1, 1811, __pyx_L1_error)
+  if (__Pyx_PyObject_DelAttrStr(__pyx_v_self->__pyx___storage, __pyx_n_s_instance) < 0) __PYX_ERR(1, 1811, __pyx_L1_error)
 
   /* "dependency_injector/providers.pyx":1806
  *         super(ThreadLocalSingleton, self).__init__(provides, *args, **kwargs)
@@ -31176,7 +31176,7 @@ static PyObject *__pyx_pf_19dependency_injector_9providers_20ThreadLocalSingleto
 }
 
 /* "dependency_injector/providers.pyx":1813
- *         self.__storage.instance = None
+ *         del self.__storage.instance
  * 
  *     cpdef object _provide(self, tuple args, dict kwargs):             # <<<<<<<<<<<<<<
  *         """Return single instance."""
@@ -31461,7 +31461,7 @@ static PyObject *__pyx_f_19dependency_injector_9providers_20ThreadLocalSingleton
   }
 
   /* "dependency_injector/providers.pyx":1813
- *         self.__storage.instance = None
+ *         del self.__storage.instance
  * 
  *     cpdef object _provide(self, tuple args, dict kwargs):             # <<<<<<<<<<<<<<
  *         """Return single instance."""
diff --git a/src/dependency_injector/providers.pyx b/src/dependency_injector/providers.pyx
index b2507974..91c0ab59 100644
--- a/src/dependency_injector/providers.pyx
+++ b/src/dependency_injector/providers.pyx
@@ -1808,7 +1808,7 @@ cdef class ThreadLocalSingleton(BaseSingleton):
 
         :rtype: None
         """
-        self.__storage.instance = None
+        del self.__storage.instance
 
     cpdef object _provide(self, tuple args, dict kwargs):
         """Return single instance."""
diff --git a/tests/unit/providers/test_singletons_py2_py3.py b/tests/unit/providers/test_singletons_py2_py3.py
index fcfb64ce..52ad1360 100644
--- a/tests/unit/providers/test_singletons_py2_py3.py
+++ b/tests/unit/providers/test_singletons_py2_py3.py
@@ -347,7 +347,7 @@ class _BaseSingletonTestCase(object):
         provider.reset()
 
         instance2 = provider()
-        self.assertIsInstance(instance1, object)
+        self.assertIsInstance(instance2, object)
 
         self.assertIsNot(instance1, instance2)
 
@@ -397,6 +397,19 @@ class ThreadLocalSingletonTests(_BaseSingletonTestCase, unittest.TestCase):
                              repr(Example),
                              hex(id(provider))))
 
+    def test_reset(self):
+        provider = providers.ThreadLocalSingleton(Example)
+
+        instance1 = provider()
+        self.assertIsInstance(instance1, Example)
+
+        provider.reset()
+
+        instance2 = provider()
+        self.assertIsInstance(instance2, Example)
+
+        self.assertIsNot(instance1, instance2)
+
 
 class DelegatedThreadLocalSingletonTests(_BaseSingletonTestCase,
                                          unittest.TestCase):