diff --git a/tests/docker_persist_test.ts b/tests/docker_persist_test.ts
index 2273141..b8ba396 100644
--- a/tests/docker_persist_test.ts
+++ b/tests/docker_persist_test.ts
@@ -63,8 +63,16 @@ Deno.test({
 
     const documented = readmePersistCommand();
     assertStringIncludes(documented, "--persist");
+    assert(
+      !documented.includes("/mnt"),
+      "README persistence command must not reference /mnt (#174)",
+    );
     const persistDir = envValue(documented, "PERSIST").replace(/\/+$/, "");
-    assert(persistDir.length > 0, "README persistence command does not set PERSIST");
+    assertEquals(
+      persistDir,
+      "/data",
+      "README persistence command must configure PERSIST=/data/ (#174)",
+    );
 
     const name = `queue-persist-test-${Date.now()}`;
     const volume = `${name}-data`;
diff --git a/tests/readme_quick_start_test.ts b/tests/readme_quick_start_test.ts
index 70b94b9..eaa8de5 100644
--- a/tests/readme_quick_start_test.ts
+++ b/tests/readme_quick_start_test.ts
@@ -46,3 +46,24 @@ Deno.test("README quick start documents authenticated, reachable commands", () =
     assertStringIncludes(command, "Authorization: Bearer");
   }
 });
+
+Deno.test(
+  "README persistence section documents writable Docker data path (#174)",
+  () => {
+    const persistSection =
+      README.match(/## Persistency([\s\S]*?)(\n## |$)/)?.[1] ?? "";
+    const persistBlocks = codeBlocks(persistSection);
+    const dockerPersist =
+      persistBlocks.find((block) => block.includes("docker run")) ?? "";
+    assert(
+      dockerPersist.length > 0,
+      "README Persistency section is missing a Docker run command",
+    );
+    assertStringIncludes(dockerPersist, "PERSIST=/data/");
+    assert(
+      !dockerPersist.includes("/mnt"),
+      "README persistence command must not reference /mnt (#174)",
+    );
+  },
+);
+