diff --git a/apps/studio/components/interfaces/Workers/Workers.utils.test.ts b/apps/studio/components/interfaces/Workers/Workers.utils.test.ts
index da791ba0349..735d86fe26c 100644
--- a/apps/studio/components/interfaces/Workers/Workers.utils.test.ts
+++ b/apps/studio/components/interfaces/Workers/Workers.utils.test.ts
@@ -112,8 +112,8 @@ describe('formatRuntime', () => {
     expect(formatRuntime('rust')).toBe('rust')
   })
 
-  it('reports unknown when the API omits the runtime', () => {
-    expect(formatRuntime(undefined)).toBe('Unknown')
+  it('labels an omitted runtime as custom', () => {
+    expect(formatRuntime(undefined)).toBe('Custom')
   })
 })
 
diff --git a/apps/studio/components/interfaces/Workers/Workers.utils.ts b/apps/studio/components/interfaces/Workers/Workers.utils.ts
index ddbcae1ee20..11678149636 100644
--- a/apps/studio/components/interfaces/Workers/Workers.utils.ts
+++ b/apps/studio/components/interfaces/Workers/Workers.utils.ts
@@ -42,7 +42,7 @@ export const getRuntimeMeta = (runtime: string | undefined): RuntimeMeta | undef
   runtime === undefined ? undefined : RUNTIMES[runtime]
 
 export const formatRuntime = (runtime: string | undefined): string =>
-  getRuntimeMeta(runtime)?.label ?? runtime ?? 'Unknown'
+  getRuntimeMeta(runtime)?.label ?? runtime ?? 'Custom'
 
 // The API reports size as e.g. "2gb-1vcpu"; render the parts when they parse, the raw value if not.
 export const formatSize = (size: string): string => {