diff --git a/lib/utils/ens-cache.js b/lib/utils/ens-cache.js
--- a/lib/utils/ens-cache.js
+++ b/lib/utils/ens-cache.js
@@ -12,13 +12,13 @@
 type ENSNameQueryCacheEntry = {
   // We normalize ETH addresses to lowercase characters
   +normalizedETHAddress: string,
-  +cacheInsertionTime: number,
+  +expirationTime: number,
   // We normalize ENS names using eth-ens-namehash
   +normalizedENSName: ?string | Promise<?string>,
 };
 type ENSAddressQueryCacheEntry = {
   +normalizedENSName: string,
-  +cacheInsertionTime: number,
+  +expirationTime: number,
   +normalizedETHAddress: ?string | Promise<?string>,
 };
 
@@ -85,7 +85,7 @@
 
     this.nameQueryCache.set(normalizedETHAddress, {
       normalizedETHAddress,
-      cacheInsertionTime: Date.now(),
+      expirationTime: Date.now() + cacheTimeout,
       normalizedENSName: fetchENSNamePromise,
     });
 
@@ -93,7 +93,7 @@
       const normalizedENSName = await fetchENSNamePromise;
       this.nameQueryCache.set(normalizedETHAddress, {
         normalizedETHAddress,
-        cacheInsertionTime: Date.now(),
+        expirationTime: Date.now() + cacheTimeout,
         normalizedENSName,
       });
       return normalizedENSName;
@@ -108,8 +108,8 @@
       return undefined;
     }
 
-    const { cacheInsertionTime } = cacheResult;
-    if (cacheInsertionTime + cacheTimeout <= Date.now()) {
+    const { expirationTime } = cacheResult;
+    if (expirationTime <= Date.now()) {
       this.nameQueryCache.delete(normalizedETHAddress);
       return undefined;
     }
@@ -152,7 +152,7 @@
 
     this.addressQueryCache.set(normalizedENSName, {
       normalizedENSName,
-      cacheInsertionTime: Date.now(),
+      expirationTime: Date.now() + cacheTimeout,
       normalizedETHAddress: fetchETHAddressPromise,
     });
 
@@ -160,7 +160,7 @@
       const normalizedETHAddress = await fetchETHAddressPromise;
       this.addressQueryCache.set(normalizedENSName, {
         normalizedENSName,
-        cacheInsertionTime: Date.now(),
+        expirationTime: Date.now() + cacheTimeout,
         normalizedETHAddress,
       });
       return normalizedETHAddress;
@@ -178,8 +178,8 @@
       return undefined;
     }
 
-    const { cacheInsertionTime } = cacheResult;
-    if (cacheInsertionTime + cacheTimeout <= Date.now()) {
+    const { expirationTime } = cacheResult;
+    if (expirationTime <= Date.now()) {
       this.addressQueryCache.delete(normalizedENSName);
       return undefined;
     }