diff --git a/packages/playwright-core/src/web/traceViewer/entries.ts b/packages/playwright-core/src/web/traceViewer/entries.ts
index c731e2dd0a..8ab2d61c7f 100644
--- a/packages/playwright-core/src/web/traceViewer/entries.ts
+++ b/packages/playwright-core/src/web/traceViewer/entries.ts
@@ -30,6 +30,7 @@ export type ContextEntry = {
   actions: trace.ActionTraceEvent[];
   events: trace.ActionTraceEvent[];
   objects: { [key: string]: any };
+  hasSource: boolean;
 };
 
 export type PageEntry = {
@@ -55,5 +56,6 @@ export function createEmptyContext(): ContextEntry {
     actions: [],
     events: [],
     objects: {},
+    hasSource: false
   };
 }
diff --git a/packages/playwright-core/src/web/traceViewer/traceModel.ts b/packages/playwright-core/src/web/traceViewer/traceModel.ts
index fc5570e952..5142294424 100644
--- a/packages/playwright-core/src/web/traceViewer/traceModel.ts
+++ b/packages/playwright-core/src/web/traceViewer/traceModel.ts
@@ -48,6 +48,8 @@ export class TraceModel {
         traceEntry = entry;
       if (entry.filename.endsWith('.network'))
         networkEntry = entry;
+      if (entry.filename.includes('src@'))
+        this.contextEntry.hasSource = true;
       this._entries.set(entry.filename, entry);
     }
     this._snapshotStorage = new PersistentSnapshotStorage(this._entries);
diff --git a/packages/playwright-core/src/web/traceViewer/ui/workbench.tsx b/packages/playwright-core/src/web/traceViewer/ui/workbench.tsx
index 31464cacd3..36c89ba8d6 100644
--- a/packages/playwright-core/src/web/traceViewer/ui/workbench.tsx
+++ b/packages/playwright-core/src/web/traceViewer/ui/workbench.tsx
@@ -124,7 +124,7 @@ export const Workbench: React.FunctionComponent<{
     { id: 'network', title: 'Network', count: networkCount, render: () => <NetworkTab action={selectedAction} /> },
   ];
 
-  if (window.location.hostname === 'localhost' || window.location.hostname === '127.0.0.1')
+  if (contextEntry.hasSource)
     tabs.push({ id: 'source', title: 'Source', count: 0, render: () => <SourceTab action={selectedAction} /> });
 
   return <div className='vbox workbench' onDragOver={event => { event.preventDefault(); setDragOver(true); }}>