diff --git a/actions/DisplayAction.php b/actions/DisplayAction.php
index c252dae0..f9ceea1f 100644
--- a/actions/DisplayAction.php
+++ b/actions/DisplayAction.php
@@ -95,7 +95,7 @@ class DisplayAction implements ActionInterface
         $mtime = $cache->getTime();
 
         if (
-            $mtime !== false
+            $mtime
             && (time() - $cache_timeout < $mtime)
             && !Debug::isEnabled()
         ) {
diff --git a/bridges/SpotifyBridge.php b/bridges/SpotifyBridge.php
index a957edf6..2a24454b 100644
--- a/bridges/SpotifyBridge.php
+++ b/bridges/SpotifyBridge.php
@@ -203,7 +203,7 @@ class SpotifyBridge extends BridgeAbstract
             $time = (new DateTime())->getTimestamp() - $cache->getTime();
         }
 
-        if ($cache->getTime() == false || $time >= 3600) {
+        if (!$cache->getTime() || $time >= 3600) {
             $this->fetchToken();
             $cache->saveData($this->token);
         } else {
diff --git a/caches/FileCache.php b/caches/FileCache.php
index 0e9d74d3..d25a60da 100644
--- a/caches/FileCache.php
+++ b/caches/FileCache.php
@@ -48,7 +48,7 @@ class FileCache implements CacheInterface
         return $this;
     }
 
-    public function getTime()
+    public function getTime(): ?int
     {
         $cacheFile = $this->getCacheFile();
         clearstatcache(false, $cacheFile);
diff --git a/caches/MemcachedCache.php b/caches/MemcachedCache.php
index 85681e89..2255fe96 100644
--- a/caches/MemcachedCache.php
+++ b/caches/MemcachedCache.php
@@ -6,7 +6,7 @@ class MemcachedCache implements CacheInterface
     private $key;
     private $conn;
     private $expiration = 0;
-    private $time = false;
+    private $time = null;
     private $data = null;
 
     public function __construct()
@@ -76,9 +76,9 @@ class MemcachedCache implements CacheInterface
         return $this;
     }
 
-    public function getTime()
+    public function getTime(): ?int
     {
-        if ($this->time === false) {
+        if ($this->time === null) {
             $this->loadData();
         }
         return $this->time;
diff --git a/caches/NullCache.php b/caches/NullCache.php
index 8e5c9e35..63917b4f 100644
--- a/caches/NullCache.php
+++ b/caches/NullCache.php
@@ -20,8 +20,9 @@ class NullCache implements CacheInterface
     {
     }
 
-    public function getTime()
+    public function getTime(): ?int
     {
+        return null;
     }
 
     public function purgeCache($seconds)
diff --git a/caches/SQLiteCache.php b/caches/SQLiteCache.php
index 1e44519b..ae531cb6 100644
--- a/caches/SQLiteCache.php
+++ b/caches/SQLiteCache.php
@@ -70,7 +70,7 @@ class SQLiteCache implements CacheInterface
         return $this;
     }
 
-    public function getTime()
+    public function getTime(): ?int
     {
         $Qselect = $this->db->prepare('SELECT updated FROM storage WHERE key = :key');
         $Qselect->bindValue(':key', $this->getCacheKey());
diff --git a/docs/07_Cache_API/02_CacheInterface.md b/docs/07_Cache_API/02_CacheInterface.md
index 609925a2..bc343ff1 100644
--- a/docs/07_Cache_API/02_CacheInterface.md
+++ b/docs/07_Cache_API/02_CacheInterface.md
@@ -27,12 +27,6 @@ saveData(mixed $data): self
 
 ## The `getTime` function
 
-This function returns the last write time for the cache, or `false` if the cache does not yet exist. Please notice that 'cache' refers to one specific item in the cache repository and might require additional data to identify a specific item (introduce custom functions where necessary!).
-
-```PHP
-getTime(): int, false
-```
-
 ## The `purgeCache` function
 
 This function removes any data from the cache that is not within the given duration. The duration is specified in seconds and defines the period between now and the oldest item to keep.
@@ -70,4 +64,4 @@ class MyTypeCache implements CacheInterface {
     }
 }
 // Imaginary empty line!
-```
\ No newline at end of file
+```
diff --git a/lib/BridgeAbstract.php b/lib/BridgeAbstract.php
index ddc1f175..537e76df 100644
--- a/lib/BridgeAbstract.php
+++ b/lib/BridgeAbstract.php
@@ -423,7 +423,13 @@ abstract class BridgeAbstract implements BridgeInterface
         $scope = $this->getShortName();
         $cache->setScope($scope);
         $cache->setKey($key);
-        if ($duration && $cache->getTime() < time() - $duration) {
+        $timestamp = $cache->getTime();
+
+        if (
+            $duration
+            && $timestamp
+            && $timestamp < time() - $duration
+        ) {
             return null;
         }
         return $cache->loadData();
diff --git a/lib/CacheInterface.php b/lib/CacheInterface.php
index 1c3b89ca..b332e21b 100644
--- a/lib/CacheInterface.php
+++ b/lib/CacheInterface.php
@@ -53,11 +53,11 @@ interface CacheInterface
     public function saveData($data);
 
     /**
-     * Returns the timestamp for the curent cache data
-     *
-     * @return ?int Timestamp
+     * Returns the modification time of the current cache item.
+     * In unix timestamp.
+     * Example: 1688570578
      */
-    public function getTime();
+    public function getTime(): ?int;
 
     /**
      * Removes any data that is older than the specified age from cache
diff --git a/lib/contents.php b/lib/contents.php
index 3fbaa620..568d5b92 100644
--- a/lib/contents.php
+++ b/lib/contents.php
@@ -432,8 +432,8 @@ function getSimpleHTMLDOMCached(
     // Determine if cached file is within duration
     $time = $cache->getTime();
     if (
-        $time !== false
-        && (time() - $duration < $time)
+        $time
+        && time() - $duration < $time
         && !Debug::isEnabled()
     ) {
         // Contents within duration and debug mode is disabled
diff --git a/tests/CacheTest.php b/tests/CacheTest.php
index f01cfc4b..9a8ada14 100644
--- a/tests/CacheTest.php
+++ b/tests/CacheTest.php
@@ -31,6 +31,7 @@ class CacheTest extends TestCase
         $sut->purgeCache(-1);
         $sut->setKey(['key']);
 
+        $this->assertNull($sut->getTime());
         $this->assertNull($sut->loadData());
 
         $sut->saveData('data');