diff --git a/__mocks__/vscode.ts b/__mocks__/vscode.ts
index 869fa694..3c010a6f 100644
--- a/__mocks__/vscode.ts
+++ b/__mocks__/vscode.ts
@@ -304,6 +304,8 @@ const window = {
         };
     }),
     showErrorMessage: vi.fn(),
+    showInformationMessage: vi.fn(),
+    showQuickPick: vi.fn(),
 };
 
 const commands = (function () {
diff --git a/package.json b/package.json
index 5916919c..64e14531 100644
--- a/package.json
+++ b/package.json
@@ -63,6 +63,10 @@
         "command": "phpunit.run-test-at-cursor",
         "title": "PHPUnit: Run the test at the current cursor position"
       },
+      {
+        "command": "phpunit.run-by-group",
+        "title": "PHPUnit: Run tests by group"
+      },
       {
         "command": "phpunit.rerun",
         "title": "PHPUnit: Repeat the last test run"
diff --git a/src/Commands/TestCommandRegistry.ts b/src/Commands/TestCommandRegistry.ts
index 9d1f645d..f5dd588e 100644
--- a/src/Commands/TestCommandRegistry.ts
+++ b/src/Commands/TestCommandRegistry.ts
@@ -68,6 +68,44 @@ export class TestCommandRegistry {
         });
     }
 
+    runByGroup() {
+        return commands.registerCommand('phpunit.run-by-group', async () => {
+            let groups = this.testCollection.findGroups();
+            if (groups.length === 0) {
+                await this.testFileDiscovery.reloadAll();
+                groups = this.testCollection.findGroups();
+            }
+            if (groups.length === 0) {
+                window.showInformationMessage(
+                    'No PHPUnit groups found. Add @group annotations or #[Group] attributes to your tests.',
+                );
+                return;
+            }
+
+            const selectedGroup = await window.showQuickPick(groups, {
+                placeHolder: 'Select a PHPUnit group to run',
+                title: 'Run Tests by Group',
+            });
+            if (!selectedGroup) {
+                return;
+            }
+
+            const tests = this.testCollection.findTestsByGroup(selectedGroup);
+            if (tests.length === 0) {
+                window.showInformationMessage(`No tests found for group "${selectedGroup}".`);
+                return;
+            }
+
+            const cancellation = new CancellationTokenSource().token;
+            await this.handler.startGroupTestRun(
+                selectedGroup,
+                tests,
+                cancellation,
+                this.testRunProfile,
+            );
+        });
+    }
+
     rerun() {
         return commands.registerCommand('phpunit.rerun', () => {
             return this.run(
diff --git a/src/TestCollection/TestCollection.test.ts b/src/TestCollection/TestCollection.test.ts
index 8a526338..4dfb9f91 100644
--- a/src/TestCollection/TestCollection.test.ts
+++ b/src/TestCollection/TestCollection.test.ts
@@ -100,6 +100,30 @@ describe('Extension TestCollection', () => {
         ]);
     });
 
+    it('find groups and tests by group', async () => {
+        const collection = givenTestCollection(`
+            <testsuites>
+                <testsuite name="default">
+                    <directory>tests</directory>
+                </testsuite>
+            </testsuites>`);
+
+        await collection.add(URI.file(phpUnitProject('tests/AssertionsTest.php')));
+        await collection.add(URI.file(phpUnitProject('tests/AttributeTest.php')));
+
+        expect(collection.findGroups()).toEqual(['integration']);
+        expect(collection.findTestsByGroup('integration')).toEqual(
+            expect.arrayContaining([
+                expect.objectContaining({
+                    id: 'Assertions (Tests\\Assertions)::Passed',
+                }),
+                expect.objectContaining({
+                    id: 'Attribute (Tests\\Attribute)::Hi',
+                }),
+            ]),
+        );
+    });
+
     it('with testsuites', async () => {
         const collection = givenTestCollection(`
             <testsuites>
diff --git a/src/TestCollection/TestCollection.ts b/src/TestCollection/TestCollection.ts
index 0a2b91ee..50711fb7 100644
--- a/src/TestCollection/TestCollection.ts
+++ b/src/TestCollection/TestCollection.ts
@@ -64,6 +64,37 @@ export class TestCollection extends BaseTestCollection {
         return tests.length > 0 ? tests : undefined;
     }
 
+    findGroups(): string[] {
+        const groups = new Set<string>();
+        for (const [, testData] of this.getTestData()) {
+            testData.forEach((_, testItem: TestItem) => {
+                (testItem.tags ?? [])
+                    .filter((tag) => tag.id.startsWith('group:'))
+                    .forEach((tag) => groups.add(tag.id.replace(/^group:/, '')));
+            });
+        }
+
+        return [...groups].sort();
+    }
+
+    findTestsByGroup(group: string): TestItem[] {
+        const groupTagId = `group:${group}`;
+        const tests: TestItem[] = [];
+        for (const [, testData] of this.getTestData()) {
+            for (const [testItem, testCase] of testData) {
+                if (testCase.type !== TestType.method) {
+                    continue;
+                }
+
+                if ((testItem.tags ?? []).some((tag) => tag.id === groupTagId)) {
+                    tests.push(testItem);
+                }
+            }
+        }
+
+        return tests;
+    }
+
     reset() {
         for (const [, testData] of this.getTestData()) {
             for (const [testItem] of testData) {
diff --git a/src/TestExecution/TestRunHandler.ts b/src/TestExecution/TestRunHandler.ts
index 7a34315c..b418908b 100644
--- a/src/TestExecution/TestRunHandler.ts
+++ b/src/TestExecution/TestRunHandler.ts
@@ -3,8 +3,10 @@ import {
     type CancellationToken,
     debug,
     type TestController,
+    type TestItem,
+    type TestRunProfile,
     type TestRun,
-    type TestRunRequest,
+    TestRunRequest,
     workspace,
 } from 'vscode';
 import { Configuration } from '../Configuration';
@@ -52,6 +54,23 @@ export class TestRunHandler {
         this.previousRequest = request;
     }
 
+    async startGroupTestRun(
+        group: string,
+        include: readonly TestItem[],
+        cancellation?: CancellationToken,
+        profile?: TestRunProfile,
+    ) {
+        const request = new TestRunRequest(include, undefined, profile);
+        const builder = await this.createProcessBuilder(request);
+        const xdebug = builder.getXdebug()!;
+        builder.setArguments(`--group=${group}`);
+
+        await this.manageDebugSession(xdebug, async () => {
+            const testRun = this.ctrl.createTestRun(request);
+            await this.runTestQueue(builder, testRun, request, cancellation, true);
+        });
+    }
+
     private async createProcessBuilder(request: TestRunRequest): Promise<ProcessBuilder> {
         const builder = new ProcessBuilder(this.configuration, { cwd: this.phpUnitXML.root() });
         const xdebug = new Xdebug(this.configuration);
@@ -80,6 +99,7 @@ export class TestRunHandler {
         testRun: TestRun,
         request: TestRunRequest,
         cancellation?: CancellationToken,
+        forceSingleProcess = false,
     ) {
         const queue = await this.testQueueBuilder.build(
             request.include ?? this.testQueueBuilder.collectItems(this.ctrl.items),
@@ -90,7 +110,7 @@ export class TestRunHandler {
         const runner = this.testRunnerBuilder.build(queue, testRun, request);
         runner.emit(TestRunnerEvent.start, undefined);
 
-        const processes = this.createProcesses(runner, builder, request);
+        const processes = this.createProcesses(runner, builder, request, forceSingleProcess);
         cancellation?.onCancellationRequested(() =>
             processes.forEach((process) => process.abort()),
         );
@@ -101,8 +121,13 @@ export class TestRunHandler {
         runner.emit(TestRunnerEvent.done, undefined);
     }
 
-    private createProcesses(runner: TestRunner, builder: ProcessBuilder, request: TestRunRequest) {
-        if (!request.include) {
+    private createProcesses(
+        runner: TestRunner,
+        builder: ProcessBuilder,
+        request: TestRunRequest,
+        forceSingleProcess = false,
+    ) {
+        if (!request.include || forceSingleProcess) {
             return [runner.run(builder)];
         }
 
diff --git a/src/extension.test.ts b/src/extension.test.ts
index abfe664b..bc8fe2fa 100644
--- a/src/extension.test.ts
+++ b/src/extension.test.ts
@@ -11,6 +11,7 @@ import {
     type TestController,
     type TestItem,
     type TestItemCollection,
+    TestRunRequest,
     TestRunProfileKind,
     type TextDocument,
     tests,
@@ -246,11 +247,12 @@ describe('Extension Test', () => {
                 'phpunit.run-all',
                 'phpunit.run-file',
                 'phpunit.run-test-at-cursor',
+                'phpunit.run-by-group',
                 'phpunit.rerun',
             ]) {
                 expect(commands.registerCommand).toHaveBeenCalledWith(cmd, expect.any(Function));
             }
-            expect(context.subscriptions.push).toHaveBeenCalledTimes(7);
+            expect(context.subscriptions.push).toHaveBeenCalledTimes(8);
         });
 
         it('should only update configuration when phpunit settings change', async () => {
@@ -368,6 +370,53 @@ describe('Extension Test', () => {
             await configuration.update('args', []);
         });
 
+        it('should run tests by selected group', async () => {
+            await activate(context);
+            (window.showQuickPick as Mock).mockResolvedValue('integration');
+
+            await commands.executeCommand('phpunit.run-by-group');
+            const testRunRequestCalls = (TestRunRequest as unknown as Mock).mock.calls;
+            const [, , profile] = testRunRequestCalls[testRunRequestCalls.length - 1];
+
+            expect(window.showQuickPick).toHaveBeenCalledWith(
+                expect.arrayContaining(['integration']),
+                expect.objectContaining({
+                    placeHolder: 'Select a PHPUnit group to run',
+                    title: 'Run Tests by Group',
+                }),
+            );
+            expectSpawnCalled([
+                binary,
+                '--group=integration',
+                '--colors=never',
+                '--teamcity',
+            ]);
+            expect(profile).toBe(getTestRunProfile(getTestController()));
+        });
+
+        it('should discover tests before running selected group when tests are not preloaded', async () => {
+            setTextDocuments([]);
+            await activate(context);
+            (window.showQuickPick as Mock).mockResolvedValue('integration');
+
+            await commands.executeCommand('phpunit.run-by-group');
+
+            expect(workspace.findFiles).toHaveBeenCalled();
+            expect(window.showQuickPick).toHaveBeenCalledWith(
+                expect.arrayContaining(['integration']),
+                expect.objectContaining({
+                    placeHolder: 'Select a PHPUnit group to run',
+                    title: 'Run Tests by Group',
+                }),
+            );
+            expectSpawnCalled([
+                binary,
+                '--group=integration',
+                '--colors=never',
+                '--teamcity',
+            ]);
+        });
+
         it('should run class with group', async () => {
             await activateAndRun({ include: 'Attribute (Tests\\Attribute)' });
 
diff --git a/src/extension.ts b/src/extension.ts
index d49aa5d0..7ac7ad9a 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -108,6 +108,7 @@ function registerCommands(
     context.subscriptions.push(testCommandRegistry.runAll());
     context.subscriptions.push(testCommandRegistry.runFile());
     context.subscriptions.push(testCommandRegistry.runTestAtCursor());
+    context.subscriptions.push(testCommandRegistry.runByGroup());
     context.subscriptions.push(testCommandRegistry.rerun());
 }