diff --git a/packages/react-reconciler/src/ReactFiberWorkLoop.new.js b/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
index 0b15fb13a2351..1791b709136d4 100644
--- a/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
+++ b/packages/react-reconciler/src/ReactFiberWorkLoop.new.js
@@ -389,7 +389,7 @@ export function requestUpdateLane(fiber: Fiber): Lane {
     workInProgressRootRenderLanes !== NoLanes
   ) {
     // This is a render phase update. These are not officially supported. The
-    // old behavior is to give this the same "thread" (expiration time) as
+    // old behavior is to give this the same "thread" (lanes) as
     // whatever is currently rendering. So if you call `setState` on a component
     // that happens later in the same render, it will flush. Ideally, we want to
     // remove the special case and treat them as if they came from an
@@ -756,7 +756,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
     }
   }
 
-  // Determine the next expiration time to work on, using the fields stored
+  // Determine the next lanes to work on, using the fields stored
   // on the root.
   let lanes = getNextLanes(
     root,
@@ -1629,7 +1629,7 @@ function completeUnitOfWork(unitOfWork: Fiber): void {
       // capture values if possible.
       const next = unwindWork(completedWork, subtreeRenderLanes);
 
-      // Because this fiber did not complete, don't reset its expiration time.
+      // Because this fiber did not complete, don't reset its lanes.
 
       if (next !== null) {
         // If completing this work spawned new work, do that next. We'll come
@@ -2308,7 +2308,7 @@ function retryTimedOutBoundary(boundaryFiber: Fiber, retryLane: Lane) {
   // The boundary fiber (a Suspense component or SuspenseList component)
   // previously was rendered in its fallback state. One of the promises that
   // suspended it has resolved, which means at least part of the tree was
-  // likely unblocked. Try rendering again, at a new expiration time.
+  // likely unblocked. Try rendering again, at a new lanes.
   if (retryLane === NoLane) {
     // TODO: Assign this to `suspenseState.retryLane`? to avoid
     // unnecessary entanglement?
diff --git a/packages/react-reconciler/src/ReactFiberWorkLoop.old.js b/packages/react-reconciler/src/ReactFiberWorkLoop.old.js
index 7b03e4cc743df..6b1ecd42d9c6c 100644
--- a/packages/react-reconciler/src/ReactFiberWorkLoop.old.js
+++ b/packages/react-reconciler/src/ReactFiberWorkLoop.old.js
@@ -389,7 +389,7 @@ export function requestUpdateLane(fiber: Fiber): Lane {
     workInProgressRootRenderLanes !== NoLanes
   ) {
     // This is a render phase update. These are not officially supported. The
-    // old behavior is to give this the same "thread" (expiration time) as
+    // old behavior is to give this the same "thread" (lanes) as
     // whatever is currently rendering. So if you call `setState` on a component
     // that happens later in the same render, it will flush. Ideally, we want to
     // remove the special case and treat them as if they came from an
@@ -756,7 +756,7 @@ function performConcurrentWorkOnRoot(root, didTimeout) {
     }
   }
 
-  // Determine the next expiration time to work on, using the fields stored
+  // Determine the next lanes to work on, using the fields stored
   // on the root.
   let lanes = getNextLanes(
     root,
@@ -1629,7 +1629,7 @@ function completeUnitOfWork(unitOfWork: Fiber): void {
       // capture values if possible.
       const next = unwindWork(completedWork, subtreeRenderLanes);
 
-      // Because this fiber did not complete, don't reset its expiration time.
+      // Because this fiber did not complete, don't reset its lanes.
 
       if (next !== null) {
         // If completing this work spawned new work, do that next. We'll come
@@ -2308,7 +2308,7 @@ function retryTimedOutBoundary(boundaryFiber: Fiber, retryLane: Lane) {
   // The boundary fiber (a Suspense component or SuspenseList component)
   // previously was rendered in its fallback state. One of the promises that
   // suspended it has resolved, which means at least part of the tree was
-  // likely unblocked. Try rendering again, at a new expiration time.
+  // likely unblocked. Try rendering again, at a new lanes.
   if (retryLane === NoLane) {
     // TODO: Assign this to `suspenseState.retryLane`? to avoid
     // unnecessary entanglement?