diff --git a/packages/backend/package.json b/packages/backend/package.json
index beacce8d..6153407f 100644
--- a/packages/backend/package.json
+++ b/packages/backend/package.json
@@ -23,12 +23,12 @@
         },
         "bootc.builder": {
           "type": "string",
-          "default": "Centos",
+          "default": "CentOS",
           "enum": [
-            "Centos",
+            "CentOS",
             "RHEL"
           ],
-          "description": "Builder image"
+          "description": "Builder image used to create disk images"
         }
       }
     },
diff --git a/packages/backend/src/build-disk-image.spec.ts b/packages/backend/src/build-disk-image.spec.ts
index c894a8d1..cc3364cb 100644
--- a/packages/backend/src/build-disk-image.spec.ts
+++ b/packages/backend/src/build-disk-image.spec.ts
@@ -257,24 +257,16 @@ test('check build exists', async () => {
 test('check uses RHEL builder', async () => {
   configurationGetConfigurationMock.mockReturnValue('RHEL');
 
-  const build = {
-    image: 'test-image',
-    type: ['ami'],
-  } as BootcBuildInfo;
-  const builder = await getBuilder(build);
+  const builder = await getBuilder();
 
   expect(builder).toBeDefined();
   expect(builder).toEqual(bootcImageBuilderRHEL);
 });
 
 test('check uses Centos builder', async () => {
-  configurationGetConfigurationMock.mockReturnValue('centos');
+  configurationGetConfigurationMock.mockReturnValue('CentOS');
 
-  const build = {
-    image: 'test-image',
-    type: ['ami'],
-  } as BootcBuildInfo;
-  const builder = await getBuilder(build);
+  const builder = await getBuilder();
 
   expect(builder).toBeDefined();
   expect(builder).toEqual(bootcImageBuilderCentos);