diff --git a/pungi/checks.py b/pungi/checks.py
index abdbf46c..88692dd6 100644
--- a/pungi/checks.py
+++ b/pungi/checks.py
@@ -572,7 +572,6 @@ def make_schema():
                 },
                 "required": ["kickstart"],
                 "additionalProperties": False,
-                "type": "object",
             },
             "osbs_config": {
                 "type": "object",
diff --git a/pungi/phases/pkgset/pkgsets.py b/pungi/phases/pkgset/pkgsets.py
index 2d5ab3ea..3cc68f25 100644
--- a/pungi/phases/pkgset/pkgsets.py
+++ b/pungi/phases/pkgset/pkgsets.py
@@ -614,7 +614,7 @@ class KojiPackageSet(PackageSetBase):
         result_srpms = []
         include_packages = set(include_packages or [])
 
-        if type(event) is dict:
+        if isinstance(event, dict):
             event = event["id"]
 
         msg = "Getting latest RPMs (tag: %s, event: %s, inherit: %s)" % (
diff --git a/tests/test_pkgset_source_koji.py b/tests/test_pkgset_source_koji.py
index 6141652c..26c12854 100644
--- a/tests/test_pkgset_source_koji.py
+++ b/tests/test_pkgset_source_koji.py
@@ -238,10 +238,10 @@ class TestGetPackageSetFromKoji(helpers.PungiTestCase):
             self.compose, self.koji_wrapper, event, module_info_str
         )
 
-        assert type(result) is list
+        assert isinstance(result, list)
         assert len(result) == 1
         module = result[0]
-        assert type(module) is dict
+        assert isinstance(module, dict)
         self.assertIn("module_stream", module)
         self.assertIn("module_version", module)
         self.assertIn("module_context", module)
@@ -367,11 +367,11 @@ class TestGetPackageSetFromKoji(helpers.PungiTestCase):
             self.compose, self.koji_wrapper, event, module_info_str
         )
 
-        assert type(result) is list
+        assert isinstance(result, list)
         assert len(result) == 2
         module = result[0]
         for module in result:
-            assert type(module) is dict
+            assert isinstance(module, dict)
             self.assertIn("module_stream", module)
             self.assertIn("module_version", module)
             self.assertIn("module_context", module)