diff --git a/src/vs/workbench/api/common/extHostTestingPrivateApi.ts b/src/vs/workbench/api/common/extHostTestingPrivateApi.ts
index 270de0bd118..26c7081cce3 100644
--- a/src/vs/workbench/api/common/extHostTestingPrivateApi.ts
+++ b/src/vs/workbench/api/common/extHostTestingPrivateApi.ts
@@ -95,7 +95,7 @@ const testItemPropAccessor = <K extends keyof vscode.TestItem>(
 	};
 };
 
-type WritableProps = Pick<vscode.TestItem, 'range' | 'label' | 'description' | 'canResolveChildren' | 'busy' | 'error' | 'tags'>;
+type WritableProps = Pick<vscode.TestItem, 'range' | 'label' | 'description' | 'sortText' | 'canResolveChildren' | 'busy' | 'error' | 'tags'>;
 
 const strictEqualComparator = <T>(a: T, b: T) => a === b;
 
@@ -107,6 +107,7 @@ const propComparators: { [K in keyof Required<WritableProps>]: (a: vscode.TestIt
 	},
 	label: strictEqualComparator,
 	description: strictEqualComparator,
+	sortText: strictEqualComparator,
 	busy: strictEqualComparator,
 	error: strictEqualComparator,
 	canResolveChildren: strictEqualComparator,
@@ -129,6 +130,7 @@ const makePropDescriptors = (api: IExtHostTestItemApi, label: string): { [K in k
 	range: testItemPropAccessor(api, 'range', undefined, propComparators.range),
 	label: testItemPropAccessor(api, 'label', label, propComparators.label),
 	description: testItemPropAccessor(api, 'description', undefined, propComparators.description),
+	sortText: testItemPropAccessor(api, 'sortText', undefined, propComparators.sortText),
 	canResolveChildren: testItemPropAccessor(api, 'canResolveChildren', false, propComparators.canResolveChildren),
 	busy: testItemPropAccessor(api, 'busy', false, propComparators.busy),
 	error: testItemPropAccessor(api, 'error', undefined, propComparators.error),
@@ -268,6 +270,7 @@ export class TestItemImpl implements vscode.TestItem {
 
 	public range!: vscode.Range | undefined;
 	public description!: string | undefined;
+	public sortText!: string | undefined;
 	public label!: string;
 	public error!: string | vscode.MarkdownString;
 	public busy!: boolean;
diff --git a/src/vs/workbench/api/common/extHostTypeConverters.ts b/src/vs/workbench/api/common/extHostTypeConverters.ts
index 6fb55ff9b3f..0ee265cda6c 100644
--- a/src/vs/workbench/api/common/extHostTypeConverters.ts
+++ b/src/vs/workbench/api/common/extHostTypeConverters.ts
@@ -1725,6 +1725,7 @@ export namespace TestItem {
 			tags: item.tags.map(t => TestTag.namespace(ctrlId, t.id)),
 			range: Range.from(item.range) || null,
 			description: item.description || null,
+			sortText: item.sortText || null,
 			error: item.error ? (MarkdownString.fromStrict(item.error) || null) : null,
 		};
 	}
@@ -1745,6 +1746,7 @@ export namespace TestItem {
 			canResolveChildren: false,
 			busy: false,
 			description: item.description || undefined,
+			sortText: item.sortText || undefined,
 		};
 	}
 
@@ -1753,6 +1755,7 @@ export namespace TestItem {
 		const testItem = new TestItemImpl(testId.controllerId, testId.localId, item.label, URI.revive(item.uri));
 		testItem.range = Range.to(item.range || undefined);
 		testItem.description = item.description || undefined;
+		testItem.sortText = item.sortText || undefined;
 		return testItem;
 	}
 
diff --git a/src/vs/workbench/contrib/testing/browser/explorerProjections/index.ts b/src/vs/workbench/contrib/testing/browser/explorerProjections/index.ts
index 9e7aec1b28e..2f62f353d6c 100644
--- a/src/vs/workbench/contrib/testing/browser/explorerProjections/index.ts
+++ b/src/vs/workbench/contrib/testing/browser/explorerProjections/index.ts
@@ -115,6 +115,10 @@ export class TestItemTreeElement implements IActionableTestTreeElement {
 		return this.test.item.description;
 	}
 
+	public get sortText() {
+		return this.test.item.sortText;
+	}
+
 	/**
 	 * Whether the node's test result is 'retired' -- from an outdated test run.
 	 */
diff --git a/src/vs/workbench/contrib/testing/browser/testingExplorerView.ts b/src/vs/workbench/contrib/testing/browser/testingExplorerView.ts
index 70b0698aaad..b0904c6d9fb 100644
--- a/src/vs/workbench/contrib/testing/browser/testingExplorerView.ts
+++ b/src/vs/workbench/contrib/testing/browser/testingExplorerView.ts
@@ -960,7 +960,7 @@ class TreeSorter implements ITreeSorter<TestExplorerTreeElement> {
 			}
 		}
 
-		return a.label.localeCompare(b.label);
+		return (a.sortText || a.label).localeCompare((b.sortText || b.label));
 	}
 }
 
diff --git a/src/vs/workbench/contrib/testing/common/testCollection.ts b/src/vs/workbench/contrib/testing/common/testCollection.ts
index 2d32a1f2896..31a63d02817 100644
--- a/src/vs/workbench/contrib/testing/common/testCollection.ts
+++ b/src/vs/workbench/contrib/testing/common/testCollection.ts
@@ -162,6 +162,7 @@ export interface ITestItem {
 	range: IRange | null;
 	description: string | null;
 	error: string | IMarkdownString | null;
+	sortText: string | null;
 }
 
 export const enum TestItemExpandState {
diff --git a/src/vscode-dts/vscode.d.ts b/src/vscode-dts/vscode.d.ts
index d873a57b74d..8e9ff6f817f 100644
--- a/src/vscode-dts/vscode.d.ts
+++ b/src/vscode-dts/vscode.d.ts
@@ -14801,6 +14801,12 @@ declare module 'vscode' {
 		 */
 		description?: string;
 
+		/**
+		 * Optional sortText to sort the test items by. If sort text exists on a
+		 * {@link TestItem} then it is used instead of {@link TestItem.label}.
+		 */
+		sortText?: string;
+
 		/**
 		 * Location of the test item in its {@link uri}.
 		 *