diff --git a/spec/unit/crypto/algorithms/megolm.spec.js b/spec/unit/crypto/algorithms/megolm.spec.js
index 22c668fcf..c8e8158bb 100644
--- a/spec/unit/crypto/algorithms/megolm.spec.js
+++ b/spec/unit/crypto/algorithms/megolm.spec.js
@@ -258,6 +258,9 @@ describe("MegolmDecryption", function() {
         });
 
         it("re-uses sessions for sequential messages", async function() {
+            mockCrypto._backupManager = {
+                backupGroupSession: () => {},
+            };
             const mockStorage = new MockStorageApi();
             const cryptoStore = new MemoryCryptoStore(mockStorage);
 
diff --git a/spec/unit/crypto/secrets.spec.js b/spec/unit/crypto/secrets.spec.js
index bcf1871da..297caf064 100644
--- a/spec/unit/crypto/secrets.spec.js
+++ b/spec/unit/crypto/secrets.spec.js
@@ -376,7 +376,7 @@ describe("Secrets", function() {
                 ]);
                 this.emit("accountData", event);
             };
-            bob._crypto.checkKeyBackup = async () => {};
+            bob._crypto._backupManager.checkKeyBackup = async () => {};
 
             const crossSigning = bob._crypto._crossSigningInfo;
             const secretStorage = bob._crypto._secretStorage;