diff --git a/extensions/memory-core/src/dreaming-narrative.test.ts b/extensions/memory-core/src/dreaming-narrative.test.ts
index 9708e5b434b..e929e84625a 100644
--- a/extensions/memory-core/src/dreaming-narrative.test.ts
+++ b/extensions/memory-core/src/dreaming-narrative.test.ts
@@ -1021,10 +1021,13 @@ describe("generateAndAppendDreamNarrative", () => {
 describe("runDetachedDreamNarrative", () => {
   type Deferred<T> = { promise: Promise<T>; resolve: (v: T) => void };
   function deferred<T>(): Deferred<T> {
-    let resolve!: (v: T) => void;
+    let resolve: ((v: T) => void) | undefined;
     const promise = new Promise<T>((r) => {
       resolve = r;
     });
+    if (!resolve) {
+      throw new Error("Expected dream narrative deferred resolver to be initialized");
+    }
     return { promise, resolve };
   }
 
diff --git a/extensions/memory-core/src/memory/manager-cache.test.ts b/extensions/memory-core/src/memory/manager-cache.test.ts
index af28895712d..6263c3b32c0 100644
--- a/extensions/memory-core/src/memory/manager-cache.test.ts
+++ b/extensions/memory-core/src/memory/manager-cache.test.ts
@@ -23,12 +23,15 @@ function createEntry(id: string): TestEntry {
 }
 
 function createDeferred<T>() {
-  let resolve!: (value: T | PromiseLike<T>) => void;
-  let reject!: (reason?: unknown) => void;
+  let resolve: ((value: T | PromiseLike<T>) => void) | undefined;
+  let reject: ((reason?: unknown) => void) | undefined;
   const promise = new Promise<T>((res, rej) => {
     resolve = res;
     reject = rej;
   });
+  if (!resolve || !reject) {
+    throw new Error("Expected deferred callbacks to be initialized");
+  }
   return { promise, resolve, reject };
 }
 
diff --git a/extensions/memory-core/src/memory/qmd-manager.test.ts b/extensions/memory-core/src/memory/qmd-manager.test.ts
index 76dd3e0edcf..6baee0c0d77 100644
--- a/extensions/memory-core/src/memory/qmd-manager.test.ts
+++ b/extensions/memory-core/src/memory/qmd-manager.test.ts
@@ -4995,11 +4995,14 @@ describe("QmdMemoryManager", () => {
 });
 
 function createDeferred<T>() {
-  let resolve!: (value: T) => void;
-  let reject!: (reason?: unknown) => void;
+  let resolve: ((value: T) => void) | undefined;
+  let reject: ((reason?: unknown) => void) | undefined;
   const promise = new Promise<T>((res, rej) => {
     resolve = res;
     reject = rej;
   });
+  if (!resolve || !reject) {
+    throw new Error("Expected deferred callbacks to be initialized");
+  }
   return { promise, resolve, reject };
 }
diff --git a/extensions/memory-core/src/memory/search-manager.test.ts b/extensions/memory-core/src/memory/search-manager.test.ts
index 6b84d11fb1c..36a2691c5c8 100644
--- a/extensions/memory-core/src/memory/search-manager.test.ts
+++ b/extensions/memory-core/src/memory/search-manager.test.ts
@@ -180,12 +180,15 @@ function requireManager(result: SearchManagerResult): SearchManager {
 }
 
 function createDeferred<T>() {
-  let resolve!: (value: T) => void;
-  let reject!: (reason?: unknown) => void;
+  let resolve: ((value: T) => void) | undefined;
+  let reject: ((reason?: unknown) => void) | undefined;
   const promise = new Promise<T>((res, rej) => {
     resolve = res;
     reject = rej;
   });
+  if (!resolve || !reject) {
+    throw new Error("Expected deferred callbacks to be initialized");
+  }
   return { promise, resolve, reject };
 }