diff --git a/extensions/image-preview/package.json b/extensions/image-preview/package.json
index ea7927fd612..1ad08ffa55e 100644
--- a/extensions/image-preview/package.json
+++ b/extensions/image-preview/package.json
@@ -45,6 +45,11 @@
         "command": "imagePreview.zoomOut",
         "title": "%command.zoomOut%",
         "category": "Image Preview"
+      },
+      {
+        "command": "imagePreview.testing.makeEdit",
+        "title": "Make test edit",
+        "category": "Image Preview"
       }
     ],
     "menus": {
@@ -58,6 +63,11 @@
           "command": "imagePreview.zoomOut",
           "when": "imagePreviewFocus",
           "group": "1_imagePreview"
+        },
+        {
+          "command": "imagePreview.testing.makeEdit",
+          "when": "imagePreviewTestMode",
+          "group": "1_imagePreview"
         }
       ]
     }
diff --git a/extensions/image-preview/src/extension.ts b/extensions/image-preview/src/extension.ts
index 81e2451e35b..49563c75ee5 100644
--- a/extensions/image-preview/src/extension.ts
+++ b/extensions/image-preview/src/extension.ts
@@ -34,5 +34,20 @@ export function activate(context: vscode.ExtensionContext) {
 	context.subscriptions.push(vscode.commands.registerCommand('imagePreview.zoomOut', () => {
 		previewManager.activePreview?.zoomOut();
 	}));
+
+	context.subscriptions.push(vscode.commands.registerCommand('imagePreview.testing.makeEdit', () => {
+		previewManager.activePreview?.test_makeEdit();
+	}));
+
+	context.subscriptions.push(vscode.workspace.onDidChangeConfiguration(e => {
+		if (e.affectsConfiguration('imagePreview.customEditorTestMode')) {
+			updateTestMode();
+		}
+	}));
+	updateTestMode();
 }
 
+function updateTestMode() {
+	const isInTestMode = vscode.workspace.getConfiguration('imagePreview').get<boolean>('customEditorTestMode', false);
+	vscode.commands.executeCommand('setContext', 'imagePreviewTestMode', isInTestMode);
+}
diff --git a/extensions/image-preview/src/preview.ts b/extensions/image-preview/src/preview.ts
index 962ea5e4866..8aa6d1fe395 100644
--- a/extensions/image-preview/src/preview.ts
+++ b/extensions/image-preview/src/preview.ts
@@ -43,15 +43,8 @@ export class PreviewManager {
 			}
 		});
 
-		const onEdit = new vscode.EventEmitter<{ now: number }>();
 		return {
-			editingCapability: {
-				onEdit: onEdit.event,
-				save: async () => { },
-				hotExit: async () => { },
-				applyEdits: async () => { },
-				undoEdits: async (edits) => { console.log('undo', edits); },
-			}
+			editingCapability: preview
 		};
 	}
 
@@ -73,7 +66,7 @@ const enum PreviewState {
 	Active,
 }
 
-class Preview extends Disposable {
+class Preview extends Disposable implements vscode.WebviewEditorEditingCapability {
 
 	private readonly id: string = `${Date.now()}-${Math.random().toString()}`;
 
@@ -246,6 +239,24 @@ class Preview extends Disposable {
 			path: this.extensionRoot.path + path
 		}));
 	}
+
+	//#region WebviewEditorCapabilities
+	private readonly _onEdit = this._register(new vscode.EventEmitter<{ now: number }>());
+	public readonly onEdit = this._onEdit.event;
+
+	async save() { }
+
+	async hotExit() { }
+
+	async applyEdits(_edits: any[]) { }
+
+	async undoEdits(edits: any[]) { console.log('undo', edits); }
+
+	//#endregion
+
+	public test_makeEdit() {
+		this._onEdit.fire({ now: Date.now() });
+	}
 }
 
 function escapeAttribute(value: string | vscode.Uri): string {