diff --git a/client/codegen.ts b/client/codegen.ts
index 117de583..4956f075 100644
--- a/client/codegen.ts
+++ b/client/codegen.ts
@@ -15,6 +15,9 @@ const config: CodegenConfig = {
       },
       plugins: [],
     },
+    "./src/gql/typenames.ts": {
+      plugins: ["./codegenGenerateTypenames.js"],
+    },
   },
   config: {
     enumsAsTypes: true,
diff --git a/client/codegenGenerateTypenames.js b/client/codegenGenerateTypenames.js
new file mode 100644
index 00000000..984e1e5b
--- /dev/null
+++ b/client/codegenGenerateTypenames.js
@@ -0,0 +1,11 @@
+// eslint-disable-next-line no-undef
+module.exports = {
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  plugin: (schema, _documents, _config) => {
+    const typeNames = Object.keys(schema.getTypeMap())
+      .filter((name) => !name.startsWith("__")) // Filter out built-in types
+      .map((name) => `export const ${name} = "${name}";\n`);
+
+    return typeNames.join("");
+  },
+};
diff --git a/client/src/gql/typenames.ts b/client/src/gql/typenames.ts
new file mode 100644
index 00000000..00c8620f
--- /dev/null
+++ b/client/src/gql/typenames.ts
@@ -0,0 +1,27 @@
+export const AssignmentAssignmentAssignmentTypeChoices = "AssignmentAssignmentAssignmentTypeChoices";
+export const AssignmentAssignmentCompletionCompletionStatusChoices = "AssignmentAssignmentCompletionCompletionStatusChoices";
+export const AssignmentCompletionMutation = "AssignmentCompletionMutation";
+export const AssignmentCompletionObjectType = "AssignmentCompletionObjectType";
+export const AssignmentCompletionStatus = "AssignmentCompletionStatus";
+export const AssignmentObjectType = "AssignmentObjectType";
+export const Boolean = "Boolean";
+export const CoreUserLanguageChoices = "CoreUserLanguageChoices";
+export const CoursePageInterface = "CoursePageInterface";
+export const CourseType = "CourseType";
+export const DateTime = "DateTime";
+export const ErrorType = "ErrorType";
+export const FeedbackResponse = "FeedbackResponse";
+export const Float = "Float";
+export const GenericScalar = "GenericScalar";
+export const ID = "ID";
+export const Int = "Int";
+export const JSONStreamField = "JSONStreamField";
+export const JSONString = "JSONString";
+export const LearningPathType = "LearningPathType";
+export const Mutation = "Mutation";
+export const Node = "Node";
+export const Query = "Query";
+export const SendFeedbackInput = "SendFeedbackInput";
+export const SendFeedbackPayload = "SendFeedbackPayload";
+export const String = "String";
+export const UserType = "UserType";
diff --git a/client/src/graphql/client.ts b/client/src/graphql/client.ts
index da7eebd8..0779344f 100644
--- a/client/src/graphql/client.ts
+++ b/client/src/graphql/client.ts
@@ -5,6 +5,10 @@ import schema from "../gql/minifiedSchema.json";
 import { devtoolsExchange } from "@urql/devtools";
 import { cacheExchange } from "@urql/exchange-graphcache";
 import { Client, fetchExchange } from "@urql/vue";
+import {
+  AssignmentCompletionMutation,
+  AssignmentCompletionObjectType,
+} from "../gql/typenames";
 
 export const graphqlClient = new Client({
   url: import.meta.env.VITE_GRAPHQL_URL || "/server/graphql/",
@@ -28,13 +32,13 @@ export const graphqlClient = new Client({
           const id = info.variables.id;
           if (id) {
             const completionData = cache.resolve(
-              { __typename: "AssignmentCompletionType", id: "1" },
+              { __typename: AssignmentCompletionObjectType, id: "1" },
               "completion_data"
             );
             return {
-              __typename: "AssignmentCompletionMutation",
+              __typename: AssignmentCompletionMutation,
               assignment_completion: {
-                __typename: "AssignmentCompletionType",
+                __typename: AssignmentCompletionObjectType,
                 id: id,
                 completion_data: Object.assign(
                   {},
diff --git a/server/vbv_lernwelt/course/creators/test_course.py b/server/vbv_lernwelt/course/creators/test_course.py
index e6681709..aaa0d743 100644
--- a/server/vbv_lernwelt/course/creators/test_course.py
+++ b/server/vbv_lernwelt/course/creators/test_course.py
@@ -10,7 +10,7 @@ from vbv_lernwelt.assignment.creators.create_assignments import (
     create_uk_fahrzeug_casework,
     create_uk_fahrzeug_prep_assignment,
 )
-from vbv_lernwelt.assignment.models import Assignment
+from vbv_lernwelt.assignment.models import Assignment, AssignmentCompletionStatus
 from vbv_lernwelt.assignment.services import update_assignment_completion
 from vbv_lernwelt.assignment.tests.assignment_factories import AssignmentListPageFactory
 from vbv_lernwelt.competence.factories import (
@@ -139,7 +139,7 @@ def create_test_assignment_submitted_data(assignment, course_session, user):
             assignment_user=user,
             assignment=assignment,
             course_session=course_session,
-            completion_status="SUBMITTED",
+            completion_status=AssignmentCompletionStatus.SUBMITTED,
         )