diff --git a/src/openApi/v2/interfaces/OpenApiOperation.d.ts b/src/openApi/v2/interfaces/OpenApiOperation.d.ts
index b0b17022..aa811bd3 100644
--- a/src/openApi/v2/interfaces/OpenApiOperation.d.ts
+++ b/src/openApi/v2/interfaces/OpenApiOperation.d.ts
@@ -16,7 +16,7 @@ export interface OpenApiOperation {
     produces?: string[];
     parameters?: OpenApiParameter[];
     responses: OpenApiResponses;
-    schemes: ('http' | 'https' | 'ws' | 'wss')[];
+    schemes?: ('http' | 'https' | 'ws' | 'wss')[];
     deprecated?: boolean;
     security?: OpenApiSecurityRequirement[];
 }
diff --git a/src/openApi/v2/parser/getServices.spec.ts b/src/openApi/v2/parser/getServices.spec.ts
new file mode 100644
index 00000000..75228719
--- /dev/null
+++ b/src/openApi/v2/parser/getServices.spec.ts
@@ -0,0 +1,31 @@
+import { getServices } from './getServices';
+
+describe('getServices', () => {
+    it('should create a unnamed service if tags are empty', () => {
+        const services = getServices({
+            swagger: '2.0',
+            info: {
+                title: 'x',
+                version: '1',
+            },
+            paths: {
+                '/api/trips': {
+                    get: {
+                        tags: [],
+                        responses: {
+                            200: {
+                                description: 'x',
+                            },
+                            default: {
+                                description: 'default',
+                            },
+                        },
+                    },
+                },
+            },
+        });
+
+        expect(services).toHaveLength(1);
+        expect(services[0].name).toEqual('');
+    });
+});
diff --git a/src/openApi/v2/parser/getServices.ts b/src/openApi/v2/parser/getServices.ts
index 486608fd..e52f8496 100644
--- a/src/openApi/v2/parser/getServices.ts
+++ b/src/openApi/v2/parser/getServices.ts
@@ -28,7 +28,7 @@ export function getServices(openApi: OpenApi): Service[] {
                         case 'patch':
                             // Each method contains an OpenAPI operation, we parse the operation
                             const op = path[method]!;
-                            const tags = op.tags?.filter(unique) || ['Service'];
+                            const tags = op.tags?.length ? op.tags.filter(unique) : [''];
                             tags.forEach(tag => {
                                 const operation = getOperation(openApi, url, method, tag, op, pathParams);
 
diff --git a/src/openApi/v3/parser/getServices.spec.ts b/src/openApi/v3/parser/getServices.spec.ts
index 2530ddab..873970ad 100644
--- a/src/openApi/v3/parser/getServices.spec.ts
+++ b/src/openApi/v3/parser/getServices.spec.ts
@@ -3,16 +3,29 @@ import { getServices } from './getServices';
 describe('getServices', () => {
     it('should create a unnamed service if tags are empty', () => {
         const services = getServices({
-            openapi: '3',
-            info: { title: 'x', version: '1' },
+            openapi: '3.0.0',
+            info: {
+                title: 'x',
+                version: '1',
+            },
             paths: {
                 '/api/trips': {
-                    get: { tags: [], responses: { 200: { description: 'X' }, default: { description: 'default' } } },
+                    get: {
+                        tags: [],
+                        responses: {
+                            200: {
+                                description: 'x',
+                            },
+                            default: {
+                                description: 'default',
+                            },
+                        },
+                    },
                 },
             },
         });
 
         expect(services).toHaveLength(1);
-        expect(services[0].name).toEqual('Unnamed');
+        expect(services[0].name).toEqual('');
     });
 });
diff --git a/src/openApi/v3/parser/getServices.ts b/src/openApi/v3/parser/getServices.ts
index f2375962..e52f8496 100644
--- a/src/openApi/v3/parser/getServices.ts
+++ b/src/openApi/v3/parser/getServices.ts
@@ -28,8 +28,7 @@ export function getServices(openApi: OpenApi): Service[] {
                         case 'patch':
                             // Each method contains an OpenAPI operation, we parse the operation
                             const op = path[method]!;
-                            const uniqueTags = op.tags?.filter(unique);
-                            const tags = uniqueTags?.length ? uniqueTags : ['Unnamed'];
+                            const tags = op.tags?.length ? op.tags.filter(unique) : [''];
                             tags.forEach(tag => {
                                 const operation = getOperation(openApi, url, method, tag, op, pathParams);
 
diff --git a/test/__snapshots__/index.spec.ts.snap b/test/__snapshots__/index.spec.ts.snap
index 5feac141..0d3dc80f 100644
--- a/test/__snapshots__/index.spec.ts.snap
+++ b/test/__snapshots__/index.spec.ts.snap
@@ -272,7 +272,7 @@ function base64(str: string): string {
 function getQueryString(params: Record<string, any>): string {
     const searchParams = new URLSearchParams();
 
-    const process = (key:string, value: any) => {
+    const process = (key: string, value: any) => {
         if (isDefined(value)) {
             if (Array.isArray(value)) {
                 value.forEach(v => {
@@ -326,7 +326,7 @@ function getFormData(options: ApiRequestOptions): FormData | undefined {
             .filter(([_, value]) => isDefined(value))
             .forEach(([key, value]) => {
                 if (Array.isArray(value)) {
-                    value.forEach(v => append(key, v));
+                    value.forEach(v => process(key, v));
                 } else {
                     process(key, value);
                 }
@@ -3121,7 +3121,7 @@ function base64(str: string): string {
 function getQueryString(params: Record<string, any>): string {
     const searchParams = new URLSearchParams();
 
-    const process = (key:string, value: any) => {
+    const process = (key: string, value: any) => {
         if (isDefined(value)) {
             if (Array.isArray(value)) {
                 value.forEach(v => {
@@ -3175,7 +3175,7 @@ function getFormData(options: ApiRequestOptions): FormData | undefined {
             .filter(([_, value]) => isDefined(value))
             .forEach(([key, value]) => {
                 if (Array.isArray(value)) {
-                    value.forEach(v => append(key, v));
+                    value.forEach(v => process(key, v));
                 } else {
                     process(key, value);
                 }