diff --git a/src/routes/test/volumes-test.js b/src/routes/test/volumes-test.js
index d5ee37342..ca5e584d3 100644
--- a/src/routes/test/volumes-test.js
+++ b/src/routes/test/volumes-test.js
@@ -7,6 +7,7 @@
 
 const common = require('./common.js'),
     expect = require('expect.js'),
+    safe = require('safetydance'),
     superagent = require('superagent');
 
 describe('Volumes API', function () {
@@ -67,17 +68,13 @@ describe('Volumes API', function () {
         expect(response.body.hostPath).to.be('/media/cloudron-test-music');
     });
 
-    it('can update volume', async function () {
-        let response = await superagent.post(`${serverUrl}/api/v1/volumes/${volumeId}`)
+    it('cannot update volume', async function () {
+        let [error, response] = await safe(superagent.post(`${serverUrl}/api/v1/volumes/${volumeId}`)
             .query({ access_token: owner.token })
-            .send({ mountOptions: { hostPath: '/media/cloudron-test-music-2' }});
-        expect(response.statusCode).to.equal(204);
+            .send({ mountOptions: { hostPath: '/media/cloudron-test-music-2' }})
+            .ok(() => true));
 
-        response = await superagent.get(`${serverUrl}/api/v1/volumes/${volumeId}`)
-            .query({ access_token: owner.token });
-        expect(response.statusCode).to.equal(200);
-        expect(response.body.id).to.be(volumeId);
-        expect(response.body.hostPath).to.be('/media/cloudron-test-music-2');
+        expect(response.statusCode).to.equal(400); // cannot update filesytem
     });
 
     it('can delete volume', async function () {
diff --git a/src/volumes.js b/src/volumes.js
index e5348bdd0..2d5edbf24 100644
--- a/src/volumes.js
+++ b/src/volumes.js
@@ -142,10 +142,9 @@ async function update(id, mountOptions, auditSource) {
     assert.strictEqual(typeof auditSource, 'object');
 
     const volume = await get(id);
-    const mountType = volume.mountType;
-    const name = volume.name;
+    const { name, mountType } = volume;
 
-    if (mountType !== 'cifs' && mountType !== 'sshfs' && mountType !== 'nfs') return;
+    if (mountType !== 'cifs' && mountType !== 'sshfs' && mountType !== 'nfs') throw new BoxError(BoxError.BAD_FIELD, 'Only network mounts can be updated');
 
     const error = mounts.validateMountOptions(mountType, mountOptions);
     if (error) throw error;