diff --git a/scidash/sciunitmodels/serializers.py b/scidash/sciunitmodels/serializers.py
index c7f543f3..3ab207cc 100644
--- a/scidash/sciunitmodels/serializers.py
+++ b/scidash/sciunitmodels/serializers.py
@@ -21,7 +21,7 @@ class Meta:
 class ModelClassSerializer(
     GetByKeyOrCreateMixin, WritableNestedModelSerializer
 ):
-    key = 'url'
+    key = 'import_path'
     capabilities = CapabilitySerializer(many=True)
     url = serializers.URLField(
         allow_null=True, allow_blank=True, validators=[]
diff --git a/scidash/sciunittests/admin.py b/scidash/sciunittests/admin.py
index d4d6f40c..5c2433f8 100644
--- a/scidash/sciunittests/admin.py
+++ b/scidash/sciunittests/admin.py
@@ -3,7 +3,7 @@
 
 from scidash.general.models import Tag
 from scidash.sciunittests.models import (
-    ScoreInstance, TestClass, TestInstance, TestSuite
+    ScoreInstance, TestClass, TestInstance, TestSuite, ScoreClass
 )
 
 # Register your models here.
@@ -45,5 +45,6 @@ class TestSuiteAdmin(admin.ModelAdmin):
 
 admin.site.register(TestSuite, TestSuiteAdmin)
 admin.site.register(ScoreInstance)
+admin.site.register(ScoreClass)
 admin.site.register(TestInstance, TestInstanceModelAdmin)
 admin.site.register(TestClass, TestClassModelAdmin)
diff --git a/scidash/sciunittests/serializers.py b/scidash/sciunittests/serializers.py
index 532dac49..b5471bbb 100644
--- a/scidash/sciunittests/serializers.py
+++ b/scidash/sciunittests/serializers.py
@@ -31,6 +31,7 @@ class TestClassSerializer(
     GetByKeyOrCreateMixin, WritableNestedModelSerializer
 ):
     units_name = serializers.CharField(required=False)
+    key = 'import_path'
 
     class Meta:
         model = TestClass