--- a/tests/src/identity.seqtest.ts
+++ b/tests/src/identity.seqtest.ts
@@ -29,6 +29,14 @@
   return (await getIdentities(helper)).flatMap(([key, _value]) => key);
 }
 
+async function getSubIdentityAccounts(helper: UniqueHelper, address: string) {
+  return ((await helper.getApi().query.identity.subsOf(address)).toHuman() as any)[1];
+}
+
+async function getSubIdentityName(helper: UniqueHelper, address: string) {
+  return ((await helper.getApi().query.identity.superOf(address)).toHuman() as any);
+}
+
 describe('Integration Test: Identities Manipulation', () => {
   let superuser: IKeyringPair;
 
@@ -45,49 +53,220 @@
       .to.be.rejectedWith(/Transaction call is not expected/);
   });
 
-  itSub('Sets identities', async ({helper}) => {
-    const oldIdentitiesCount = (await getIdentityAccounts(helper)).length;
+  describe('Identities', () => {
+    itSub('Sets identities', async ({helper}) => {
+      const oldIdentitiesCount = (await getIdentityAccounts(helper)).length;
 
-    const crowdSize = 10;
-    const crowd = await helper.arrange.createCrowd(crowdSize, 0n, superuser);
-    const identities = crowd.map((acc, i) => [acc.address, {info: {display: {Raw: `accounter #${i}`}}}]);
-    await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceInsertIdentities', [identities]);
+      const crowdSize = 10;
+      const crowd = await helper.arrange.createCrowd(crowdSize, 0n, superuser);
+      const identities = crowd.map((acc, i) => [acc.address, {info: {display: {Raw: `accounter #${i}`}}}]);
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceInsertIdentities', [identities]);
 
-    expect((await getIdentityAccounts(helper)).length).to.be.equal(oldIdentitiesCount + crowdSize);
-  });
+      expect((await getIdentityAccounts(helper)).length).to.be.equal(oldIdentitiesCount + crowdSize);
+    });
 
-  itSub('Setting identities does not delete existing but does overwrite', async ({helper}) => {
-    const crowd = await helper.arrange.createCrowd(10, 0n, superuser);
-    const identities = crowd.map((acc, i) => [acc.address, {info: {display: {Raw: `accounter #${i}`}}}]);
+    itSub('Setting identities does not delete existing but does overwrite', async ({helper}) => {
+      const crowd = await helper.arrange.createCrowd(10, 0n, superuser);
+      const identities = crowd.map((acc, i) => [acc.address, {info: {display: {Raw: `accounter #${i}`}}}]);
+
+      // insert a single identity
+      let singleIdentity = identities.pop()!;
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceInsertIdentities', [[singleIdentity]]);
 
-    // insert a single identity
-    let singleIdentity = identities.pop()!;
-    await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceInsertIdentities', [[singleIdentity]]);
+      const oldIdentitiesCount = (await getIdentityAccounts(helper)).length;
 
-    const oldIdentitiesCount = (await getIdentityAccounts(helper)).length;
+      // change an identity and push it with a few new others
+      singleIdentity = [singleIdentity[0], {info: {display: {Raw: 'something special'}}}];
+      identities.push(singleIdentity);
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceInsertIdentities', [identities]);
 
-    // change an identity and push it with a few new others
-    singleIdentity = [singleIdentity[0], {info: {display: {Raw: 'something special'}}}];
-    identities.push(singleIdentity);
-    await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceInsertIdentities', [identities]);
+      // oldIdentitiesCount + 9 because one identity is overwritten, not inserted on top
+      expect((await getIdentityAccounts(helper)).length).to.be.equal(oldIdentitiesCount + 9);
+      expect((await helper.callRpc('api.query.identity.identityOf', [singleIdentity[0]])).toHuman().info.display)
+        .to.be.deep.equal({Raw: 'something special'});
+    });
 
-    // oldIdentitiesCount + 9 because one identity is overwritten, not inserted on top
-    expect((await getIdentityAccounts(helper)).length).to.be.equal(oldIdentitiesCount + 9);
-    expect((await helper.callRpc('api.query.identity.identityOf', [singleIdentity[0]])).toHuman().info.display)
-      .to.be.deep.equal({Raw: 'something special'});
+    itSub('Removes identities', async ({helper}) => {
+      const crowd = await helper.arrange.createCrowd(10, 0n, superuser);
+      const identities = crowd.map((acc, i) => [acc.address, {info: {display: {Raw: `accounter #${i}`}}}]);
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceInsertIdentities', [identities]);
+      const oldIdentities = await getIdentityAccounts(helper);
+
+      // delete a couple, check that they are no longer there
+      const scapegoats = [crowd.pop()!.address, crowd.pop()!.address];
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceRemoveIdentities', [scapegoats]);
+      const newIdentities = await getIdentityAccounts(helper);
+      expect(newIdentities.concat(scapegoats)).to.be.have.members(oldIdentities);
+    });
   });
 
-  itSub('Removes identities', async ({helper}) => {
-    const crowd = await helper.arrange.createCrowd(10, 0n, superuser);
-    const identities = crowd.map((acc, i) => [acc.address, {info: {display: {Raw: `accounter #${i}`}}}]);
-    await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceInsertIdentities', [identities]);
-    const oldIdentities = await getIdentityAccounts(helper);
+  describe('Sub-identities', () => {
+    itSub('Sets subs', async ({helper}) => {
+      const crowdSize = 18;
+      const crowd = await helper.arrange.createCrowd(crowdSize, 0n, superuser);
+      const supers = [crowd.pop()!, crowd.pop()!, crowd.pop()!];
 
-    // delete a couple, check that they are no longer there
-    const scapegoats = [crowd.pop()!.address, crowd.pop()!.address];
-    await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceRemoveIdentities', [scapegoats]);
-    const newIdentities = await getIdentityAccounts(helper);
-    expect(newIdentities.concat(scapegoats)).to.be.have.members(oldIdentities);
+      const subsPerSup = crowd.length / supers.length;
+      let subCount = 0;
+      const subs = [
+        crowd.slice(subCount, subCount += subsPerSup + 1),
+        crowd.slice(subCount, subCount += subsPerSup),
+        crowd.slice(subCount, subCount += subsPerSup - 1),
+      ];
+
+      const subsInfo = supers.map((acc, i) => [
+        acc.address, [
+          1000000n + BigInt(i + 1),
+          subs[i].map((sub, j) => [
+            sub.address, {Raw: `accounter #${j}`},
+          ]),
+        ],
+      ]);
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceSetSubs', [subsInfo]);
+
+      for (let i = 0; i < supers.length; i++) {
+        // check deposit
+        expect(((await helper.getApi().query.identity.subsOf(supers[i].address)).toJSON() as any)[0]).to.be.equal(1000001 + i);
+
+        const subsAccounts = await getSubIdentityAccounts(helper, supers[i].address);
+        // check sub-identities as account ids
+        expect(subsAccounts).to.include.members(subs[i].map(x => x.address));
+
+        for (let j = 0; j < subsAccounts.length; j++) {
+          // check sub-identities' names
+          expect((await getSubIdentityName(helper, subsAccounts[j]))[1]).to.be.deep.equal({Raw: `accounter #${j}`});
+        }
+      }
+    });
+
+    itSub('Setting sub-identities does not delete other existing but does overwrite own', async ({helper}) => {
+      const crowdSize = 18;
+      const crowd = await helper.arrange.createCrowd(crowdSize, 0n, superuser);
+      const supers = [crowd.pop()!, crowd.pop()!, crowd.pop()!];
+
+      const subsPerSup = crowd.length / supers.length;
+      let subCount = 0;
+      const subs = [
+        crowd.slice(subCount, subCount += subsPerSup + 1),
+        crowd.slice(subCount, subCount += subsPerSup),
+        crowd.slice(subCount, subCount += subsPerSup - 1),
+      ];
+
+      const subsInfo1 = supers.map((acc, i) => [
+        acc.address, [
+          1000000n + BigInt(i + 1),
+          subs[i].map((sub, j) => [
+            sub.address, {Raw: `accounter #${j}`},
+          ]),
+        ],
+      ]);
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceSetSubs', [subsInfo1]);
+
+      // change some sub-identities...
+      subs[2].pop(); subs[2].pop(); subs[2].push(...await helper.arrange.createAccounts([0n], superuser));
+
+      // ...and set them
+      const subsInfo2 = [[
+        supers[2].address, [
+          999999n,
+          subs[2].map((sub, j) => [
+            sub.address, {Raw: `discounter #${j}`},
+          ]),
+        ],
+      ]];
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceSetSubs', [subsInfo2]);
+
+      // make sure everything else is the same
+      for (let i = 0; i < supers.length - 1; i++) {
+        // check deposit
+        expect(((await helper.getApi().query.identity.subsOf(supers[i].address)).toJSON() as any)[0]).to.be.equal(1000001 + i);
+
+        const subsAccounts = await getSubIdentityAccounts(helper, supers[i].address);
+        // check sub-identities as account ids
+        expect(subsAccounts).to.include.members(subs[i].map(x => x.address));
+
+        for (let j = 0; j < subsAccounts; j++) {
+          // check sub-identities' names
+          expect((await getSubIdentityName(helper, subsAccounts[j]))[1]).to.be.deep.equal({Raw: `accounter #${j}`});
+        }
+      }
+
+      // check deposit
+      expect(((await helper.getApi().query.identity.subsOf(supers[2].address)).toJSON() as any)[0]).to.be.equal(999999);
+
+      const subsAccounts = await getSubIdentityAccounts(helper, supers[2].address);
+      // check sub-identities as account ids
+      expect(subsAccounts).to.include.members(subs[2].map(x => x.address));
+
+      for (let j = 0; j < subsAccounts.length; j++) {
+        // check sub-identities' names
+        expect((await getSubIdentityName(helper, subsAccounts[j]))[1]).to.be.deep.equal({Raw: `discounter #${j}`});
+      }
+    });
+
+    itSub('Removes sub-identities', async ({helper}) => {
+      const crowdSize = 3;
+      const crowd = await helper.arrange.createCrowd(crowdSize, 0n, superuser);
+      const sup = crowd.pop()!;
+
+      const subsInfo1 = [[
+        sup.address, [
+          1000000n,
+          crowd.map((sub, j) => [
+            sub.address, {Raw: `accounter #${j}`},
+          ]),
+        ],
+      ]];
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceSetSubs', [subsInfo1]);
+
+      // empty sub-identities should delete the records
+      const subsInfo2 = [[
+        sup.address, [
+          1000000n,
+          [],
+        ],
+      ]];
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceSetSubs', [subsInfo2]);
+
+      // check deposit
+      expect((await helper.getApi().query.identity.subsOf(sup.address)).toHuman()).to.be.deep.equal(['0', []]);
+
+      for (let j = 0; j < crowd.length; j++) {
+        // check sub-identities' names
+        expect((await getSubIdentityName(helper, crowd[j].address))).to.be.null;
+      }
+    });
+
+    itSub('Removing identities deletes associated sub-identities', async ({helper}) => {
+      const crowd = await helper.arrange.createCrowd(3, 0n, superuser);
+      const sup = crowd.pop()!;
+
+      // insert identity
+      const identities = [[sup.address, {info: {display: {Raw: 'mental'}}}]];
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceInsertIdentities', [identities]);
+
+      // and its sub-identities
+      const subsInfo = [[
+        sup.address, [
+          1000000n,
+          crowd.map((sub, j) => [
+            sub.address, {Raw: `accounter #${j}`},
+          ]),
+        ],
+      ]];
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceSetSubs', [subsInfo]);
+
+      // delete top identity
+      await helper.getSudo().executeExtrinsic(superuser, 'api.tx.identity.forceRemoveIdentities', [[sup.address]]);
+
+      // check that sub-identities are deleted
+      expect((await helper.getApi().query.identity.subsOf(sup.address)).toHuman()).to.be.deep.equal(['0', []]);
+
+      for (let j = 0; j < crowd.length; j++) {
+        // check sub-identities' names
+        expect((await getSubIdentityName(helper, crowd[j].address))).to.be.null;
+      }
+    });
   });
 
   after(async function() {