diff --git a/keymaster-lib.js b/keymaster-lib.js
index a2be8f52..42d8025a 100644
--- a/keymaster-lib.js
+++ b/keymaster-lib.js
@@ -369,7 +369,7 @@ export async function verifySignature(obj) {
     }
 }
 
-async function updateDID(did, doc) {
+export async function updateDID(did, doc) {
     const current = await resolveDID(did);
     const prev = cipher.hashJSON(current);
 
@@ -385,7 +385,7 @@ async function updateDID(did, doc) {
     return gatekeeper.updateDID(signed);
 }
 
-async function revokeDID(did) {
+export async function revokeDID(did) {
     const current = await resolveDID(did);
     const prev = cipher.hashJSON(current);
 
diff --git a/keymaster.test.js b/keymaster.test.js
index a1d53f6c..2e490099 100644
--- a/keymaster.test.js
+++ b/keymaster.test.js
@@ -730,6 +730,111 @@ describe('createAsset', () => {
     });
 });
 
+describe('updateDID', () => {
+
+    afterEach(() => {
+        mockFs.restore();
+    });
+
+    it('should update an asset DID', async () => {
+        mockFs({});
+
+        await keymaster.createId('Bob');
+        const mockAnchor = { name: 'mockAnchor' };
+        const dataDid = await keymaster.createAsset(mockAnchor);
+        const doc = await keymaster.resolveDID(dataDid);
+
+        const dataUpdated = { name: 'updated' };
+        doc.didDocumentData = dataUpdated;
+
+        const ok = await keymaster.updateDID(dataDid, doc);
+        const doc2 = await keymaster.resolveDID(dataDid);
+
+        expect(ok).toBe(true);
+        expect(doc2.didDocumentData).toStrictEqual(dataUpdated);
+        expect(doc2.didDocumentMetadata.version).toBe(2);
+    });
+
+    it('should update an asset DID when current ID is not owner ID', async () => {
+        mockFs({});
+
+        const bob = await keymaster.createId('Bob');
+        await keymaster.createId('Alice');
+
+        keymaster.setCurrentId('Bob');
+
+        const mockAnchor = { name: 'mockAnchor' };
+        const dataDid = await keymaster.createAsset(mockAnchor);
+        const doc = await keymaster.resolveDID(dataDid);
+
+        const dataUpdated = { name: 'updated' };
+        doc.didDocumentData = dataUpdated;
+
+        keymaster.setCurrentId('Alice');
+
+        const ok = await keymaster.updateDID(dataDid, doc);
+        const doc2 = await keymaster.resolveDID(dataDid);
+
+        expect(ok).toBe(true);
+        expect(doc2.didDocument.controller).toBe(bob);
+        expect(doc2.didDocumentData).toStrictEqual(dataUpdated);
+        expect(doc2.didDocumentMetadata.version).toBe(2);
+    });
+});
+
+describe('revokeDID', () => {
+
+    afterEach(() => {
+        mockFs.restore();
+    });
+
+    it('should revoke an asset DID', async () => {
+        mockFs({});
+
+        await keymaster.createId('Bob');
+        const mockAnchor = { name: 'mockAnchor' };
+        const dataDid = await keymaster.createAsset(mockAnchor);
+        const doc = await keymaster.resolveDID(dataDid);
+
+        const dataUpdated = { name: 'updated' };
+        doc.didDocumentData = dataUpdated;
+
+        const ok = await keymaster.revokeDID(dataDid, doc);
+        const doc2 = await keymaster.resolveDID(dataDid);
+
+        expect(ok).toBe(true);
+        expect(doc2.didDocument).toStrictEqual({});
+        expect(doc2.didDocumentData).toStrictEqual({});
+        expect(doc2.didDocumentMetadata.deactivated).toBe(true);
+    });
+
+    it('should revoke an asset DID when current ID is not owner ID', async () => {
+        mockFs({});
+
+        await keymaster.createId('Bob');
+        await keymaster.createId('Alice');
+
+        keymaster.setCurrentId('Bob');
+
+        const mockAnchor = { name: 'mockAnchor' };
+        const dataDid = await keymaster.createAsset(mockAnchor);
+        const doc = await keymaster.resolveDID(dataDid);
+
+        const dataUpdated = { name: 'updated' };
+        doc.didDocumentData = dataUpdated;
+
+        keymaster.setCurrentId('Alice');
+
+        const ok = await keymaster.revokeDID(dataDid, doc);
+        const doc2 = await keymaster.resolveDID(dataDid);
+
+        expect(ok).toBe(true);
+        expect(doc2.didDocument).toStrictEqual({});
+        expect(doc2.didDocumentData).toStrictEqual({});
+        expect(doc2.didDocumentMetadata.deactivated).toBe(true);
+    });
+});
+
 function generateRandomString(length) {
     let result = '';
     let characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';