diff --git a/murano/dsl/dsl.py b/murano/dsl/dsl.py
index 4ff5ba2b4..d5aea9854 100644
--- a/murano/dsl/dsl.py
+++ b/murano/dsl/dsl.py
@@ -351,8 +351,9 @@ def to_mutable(obj, yaql_engine=None):
         else:
             return utils.convert_output_data(value, limit_func, engine, rec)
 
-    limiter = lambda it: utils.limit_iterable(
-        it, CONF.murano.dsl_iterators_limit)
+    def limiter(it):
+        return utils.limit_iterable(it, CONF.murano.dsl_iterators_limit)
+
     return converter(obj, limiter, yaql_engine, converter)
 
 
diff --git a/murano/dsl/meta.py b/murano/dsl/meta.py
index c841c2e04..29cfdba7d 100644
--- a/murano/dsl/meta.py
+++ b/murano/dsl/meta.py
@@ -116,7 +116,8 @@ def merge_providers(initial_class, producer, context):
 
 
 def aggregate_meta(provider, context, group_by_name=True):
-    key_func = lambda m: m.type.name if group_by_name else m.type
+    def key_func(m):
+        return m.type.name if group_by_name else m.type
     meta = provider.get_meta(context)
     result = {}
     for item in meta:
diff --git a/murano/dsl/yaql_integration.py b/murano/dsl/yaql_integration.py
index fa27d297a..939dffb25 100644
--- a/murano/dsl/yaql_integration.py
+++ b/murano/dsl/yaql_integration.py
@@ -154,9 +154,10 @@ def _infer_parameter_type(name, class_name):
 
 def get_function_definition(func, murano_method, original_name):
     cls = murano_method.declaring_type.extension_class
-    param_type_func = \
-        lambda name: None if not cls else _infer_parameter_type(
-            name, cls.__name__)
+
+    def param_type_func(name):
+        return None if not cls else _infer_parameter_type(name, cls.__name__)
+
     body = func
     if (cls is None or helpers.inspect_is_method(cls, original_name) or
             helpers.inspect_is_classmethod(cls, original_name)):
diff --git a/murano/tests/unit/common/messaging/test_mqclient.py b/murano/tests/unit/common/messaging/test_mqclient.py
index f24dec1db..d4caf0b8b 100644
--- a/murano/tests/unit/common/messaging/test_mqclient.py
+++ b/murano/tests/unit/common/messaging/test_mqclient.py
@@ -216,7 +216,8 @@ class MQClientTest(base.MuranoTestCase):
     def test_send_signed(self, mock_kombu):
         mock_message = mock.MagicMock(body='test_message', id=3)
 
-        signer = lambda msg: "SIGNATURE"
+        signer = mock.MagicMock()
+        signer.return_value = "SIGNATURE"
         self.ssl_client.connect()
         self.ssl_client.send(mock_message, 'test_key', 'test_exchange', signer)
 
diff --git a/murano/tests/unit/dsl/test_helpers.py b/murano/tests/unit/dsl/test_helpers.py
index e90839b20..1e38c2331 100644
--- a/murano/tests/unit/dsl/test_helpers.py
+++ b/murano/tests/unit/dsl/test_helpers.py
@@ -302,7 +302,8 @@ class TestDSLHelpers(base.MuranoTestCase):
             [mock.sentinel.second], [mock.sentinel.third]
         ]
         first_obj = mock.sentinel.first
-        handler = lambda i: True
+        handler = mock.MagicMock()
+        handler.return_value = True
 
         expected = [
             [mock.sentinel.first],
@@ -321,7 +322,8 @@ class TestDSLHelpers(base.MuranoTestCase):
             [mock.sentinel.second], [mock.sentinel.second]
         ]
         first_obj = mock.sentinel.first
-        handler = lambda i: True
+        handler = mock.MagicMock()
+        handler.return_value = True
 
         expected = [
             [mock.sentinel.first],
diff --git a/murano/tests/unit/dsl/test_session_local_storage.py b/murano/tests/unit/dsl/test_session_local_storage.py
index 1ae4ec5a4..5d6743df0 100644
--- a/murano/tests/unit/dsl/test_session_local_storage.py
+++ b/murano/tests/unit/dsl/test_session_local_storage.py
@@ -97,7 +97,8 @@ class TestExecutionSessionMemoize(test_case.DslTestCase):
     @mock.patch.object(helpers, 'get_memoize_func',
                        return_value=mock.sentinel.mem_func)
     def test_execution_session_memoize(self, mock_gef):
-        f = lambda: 'im a function'
+        f = mock.MagicMock()
+        f.return_value = 'im a function'
         new_f = session_local_storage.execution_session_memoize(f)
         self.assertEqual(f, mock_gef.call_args[0][0])
         self.assertIsInstance(mock_gef.call_args[0][1],