diff --git a/packages/element-web-playwright-common/src/fixtures/services.ts b/packages/element-web-playwright-common/src/fixtures/services.ts
index d4256c6213..de5e9af680 100644
--- a/packages/element-web-playwright-common/src/fixtures/services.ts
+++ b/packages/element-web-playwright-common/src/fixtures/services.ts
@@ -7,7 +7,7 @@ Please see LICENSE files in the repository root for full details.
 
 import { type MailpitClient } from "mailpit-api";
 import { Network, type StartedNetwork } from "testcontainers";
-import { PostgreSqlContainer, type StartedPostgreSqlContainer } from "@testcontainers/postgresql";
+import { type StartedPostgreSqlContainer } from "@testcontainers/postgresql";
 
 import {
     type SynapseConfig,
@@ -22,6 +22,7 @@ import { Logger } from "../utils/logger.js";
 // We want to avoid using `mergeTests` in index.ts because it drops useful type information about the fixtures. Instead,
 // we add `axe` into our fixture suite by using its `test` as a base, so that there is a linear hierarchy.
 import { test as base } from "./axe.js";
+import { makePostgres } from "../testcontainers/postgres.js";
 
 /**
  * Test-scoped fixtures available in the test
@@ -101,27 +102,7 @@ export const test = base.extend<TestFixtures, WorkerOptions & Services>({
     ],
     postgres: [
         async ({ logger, network }, use) => {
-            const container = await new PostgreSqlContainer("postgres:13.3-alpine")
-                .withNetwork(network)
-                .withNetworkAliases("postgres")
-                .withLogConsumer(logger.getConsumer("postgres"))
-                .withTmpFs({
-                    "/dev/shm/pgdata/data": "",
-                })
-                .withEnvironment({
-                    PG_DATA: "/dev/shm/pgdata/data",
-                })
-                .withCommand([
-                    "-c",
-                    "shared_buffers=128MB",
-                    "-c",
-                    `fsync=off`,
-                    "-c",
-                    `synchronous_commit=off`,
-                    "-c",
-                    "full_page_writes=off",
-                ])
-                .start();
+            const container = await makePostgres(network, logger);
             await use(container);
             await container.stop();
         },
diff --git a/packages/element-web-playwright-common/src/testcontainers/mas.ts b/packages/element-web-playwright-common/src/testcontainers/mas.ts
index 430875797b..8e64db59f8 100644
--- a/packages/element-web-playwright-common/src/testcontainers/mas.ts
+++ b/packages/element-web-playwright-common/src/testcontainers/mas.ts
@@ -11,6 +11,7 @@ import {
     type StartedTestContainer,
     Wait,
     type ExecResult,
+    type StartedNetwork,
 } from "testcontainers";
 import { type StartedPostgreSqlContainer } from "@testcontainers/postgresql";
 import * as YAML from "yaml";
@@ -23,6 +24,7 @@ import { type Credentials } from "../utils/api.js";
 //   curl -sL https://element-hq.github.io/matrix-authentication-service/config.schema.json \
 //     | npx json-schema-to-typescript -o packages/element-web-playwright-common/src/testconainers/mas-config.ts
 import type { RootConfig as MasConfig } from "./mas-config.js";
+import type { Logger } from "../utils/logger.js";
 
 export { type MasConfig };
 
@@ -349,3 +351,19 @@ export class StartedMatrixAuthenticationServiceContainer extends AbstractStarted
         await this.manage("add-email", username, address);
     }
 }
+
+export async function makeMas(
+    postgres: StartedPostgreSqlContainer,
+    network: StartedNetwork,
+    logger: Logger,
+    config: Partial<MasConfig>,
+    name = "mas",
+): Promise<StartedMatrixAuthenticationServiceContainer> {
+    const container = await new MatrixAuthenticationServiceContainer(postgres)
+        .withNetwork(network)
+        .withNetworkAliases(name)
+        .withLogConsumer(logger.getConsumer(name))
+        .withConfig(config)
+        .start();
+    return container;
+}
diff --git a/packages/element-web-playwright-common/src/testcontainers/postgres.ts b/packages/element-web-playwright-common/src/testcontainers/postgres.ts
new file mode 100644
index 0000000000..0dd0eab27d
--- /dev/null
+++ b/packages/element-web-playwright-common/src/testcontainers/postgres.ts
@@ -0,0 +1,40 @@
+/*
+Copyright 2026 Element Creations Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE files in the repository root for full details.
+*/
+
+import { PostgreSqlContainer, type StartedPostgreSqlContainer } from "@testcontainers/postgresql";
+import { type StartedNetwork } from "testcontainers";
+
+import { type Logger } from "../utils/logger.js";
+
+export async function makePostgres(
+    network: StartedNetwork,
+    logger: Logger,
+    name = "postgres",
+): Promise<StartedPostgreSqlContainer> {
+    const container = await new PostgreSqlContainer("postgres:13.3-alpine")
+        .withNetwork(network)
+        .withNetworkAliases(name)
+        .withLogConsumer(logger.getConsumer(name))
+        .withTmpFs({
+            "/dev/shm/pgdata/data": "",
+        })
+        .withEnvironment({
+            PG_DATA: "/dev/shm/pgdata/data",
+        })
+        .withCommand([
+            "-c",
+            "shared_buffers=128MB",
+            "-c",
+            `fsync=off`,
+            "-c",
+            `synchronous_commit=off`,
+            "-c",
+            "full_page_writes=off",
+        ])
+        .start();
+    return container;
+}