diff --git a/packages/libp2p-interfaces-compliance-tests/src/peer-id/index.ts b/packages/libp2p-interfaces-compliance-tests/src/peer-id/index.ts
index b9cbf736a..4f5c34d5a 100644
--- a/packages/libp2p-interfaces-compliance-tests/src/peer-id/index.ts
+++ b/packages/libp2p-interfaces-compliance-tests/src/peer-id/index.ts
@@ -58,14 +58,14 @@ export default (common: TestSetup<PeerIdFactory>) => {
 
     it('can be created for a Secp256k1 key', async () => {
       const id = await factory.create({ keyType: 'secp256k1', bits: 256 })
-      const expB58 = base58btc.encode((await identity.digest(id.pubKey.bytes)).bytes).slice(1)
+      const expB58 = base58btc.encode((await identity.digest(id.pubKey!.bytes)).bytes).slice(1)
       expect(id.toB58String()).to.equal(expB58)
     })
 
     it('can get the public key from a Secp256k1 key', async () => {
       const original = await factory.create({ keyType: 'secp256k1', bits: 256 })
       const newId = factory.createFromB58String(original.toB58String())
-      expect(original.pubKey.bytes).to.eql(newId.pubKey.bytes)
+      expect(original.pubKey!.bytes).to.eql(newId.pubKey!.bytes)
     })
 
     it('isPeerId', async () => {
@@ -194,7 +194,7 @@ export default (common: TestSetup<PeerIdFactory>) => {
       const key = '12D3KooWRm8J3iL796zPFi2EtGGtUJn58AG67gcqzMFHZnnsTzqD'
       const id = await factory.parse(key)
       expect(id.toB58String()).to.equal(key)
-      const expB58 = base58btc.encode((await identity.digest(id.pubKey.bytes)).bytes).slice(1)
+      const expB58 = base58btc.encode((await identity.digest(id.pubKey!.bytes)).bytes).slice(1)
       expect(id.toB58String()).to.equal(expB58)
     })
 
@@ -202,7 +202,7 @@ export default (common: TestSetup<PeerIdFactory>) => {
       const key = '16Uiu2HAm5qw8UyXP2RLxQUx5KvtSN8DsTKz8quRGqGNC3SYiaB8E'
       const id = await factory.parse(key)
       expect(id.toB58String()).to.equal(key)
-      const expB58 = base58btc.encode((await identity.digest(id.pubKey.bytes)).bytes).slice(1)
+      const expB58 = base58btc.encode((await identity.digest(id.pubKey!.bytes)).bytes).slice(1)
       expect(id.toB58String()).to.equal(expB58)
     })
 
@@ -215,20 +215,20 @@ export default (common: TestSetup<PeerIdFactory>) => {
     it('can be created from a Secp256k1 public key', async () => {
       const privKey = await crypto.keys.generateKeyPair('secp256k1', 256)
       const id = await factory.createFromPubKey(privKey.public.bytes)
-      const expB58 = base58btc.encode((await identity.digest(id.pubKey.bytes)).bytes).slice(1)
+      const expB58 = base58btc.encode((await identity.digest(id.pubKey!.bytes)).bytes).slice(1)
       expect(id.toB58String()).to.equal(expB58)
     })
 
     it('can be created from a Secp256k1 private key', async () => {
       const privKey = await crypto.keys.generateKeyPair('secp256k1', 256)
       const id = await factory.createFromPrivKey(privKey.bytes)
-      const expB58 = base58btc.encode((await identity.digest(id.pubKey.bytes)).bytes).slice(1)
+      const expB58 = base58btc.encode((await identity.digest(id.pubKey!.bytes)).bytes).slice(1)
       expect(id.toB58String()).to.equal(expB58)
     })
 
     it('Compare generated ID with one created from PubKey', async () => {
       const id1 = await factory.create(testOpts)
-      const id2 = await factory.createFromPubKey(id1.marshalPubKey())
+      const id2 = await factory.createFromPubKey(id1.marshalPubKey()!)
       expect(id1.id).to.be.eql(id2.id)
     })
 
@@ -242,7 +242,7 @@ export default (common: TestSetup<PeerIdFactory>) => {
       this.timeout(1000 * 60)
       const shortId = await factory.create(testOpts)
       const longId = await factory.create({ bits: 1024 })
-      expect(shortId.privKey.bytes.length).is.below(longId.privKey.bytes.length)
+      expect(shortId.privKey!.bytes.length).is.below(longId.privKey!.bytes.length)
     })
 
     it('Pretty printing', async () => {
@@ -292,8 +292,8 @@ export default (common: TestSetup<PeerIdFactory>) => {
         const id = await factory.create(testOpts)
         const other = await factory.createFromJSON(id.toJSON())
         expect(id.toB58String()).to.equal(other.toB58String())
-        expect(id.privKey.bytes).to.eql(other.privKey.bytes)
-        expect(id.pubKey.bytes).to.eql(other.pubKey.bytes)
+        expect(id.privKey!.bytes).to.eql(other.privKey!.bytes)
+        expect(id.pubKey!.bytes).to.eql(other.pubKey!.bytes)
       })
 
       it('only id', async () => {
@@ -308,7 +308,7 @@ export default (common: TestSetup<PeerIdFactory>) => {
 
       it('go interop', async () => {
         const id = await factory.createFromJSON(goId)
-        const digest = await id.privKey.public.hash()
+        const digest = await id.privKey!.public.hash()
         expect(base58btc.encode(digest).slice(1)).to.eql(goId.id)
       })
     })