diff --git a/sources/Service/Router/Router.php b/sources/Service/Router/Router.php
index 4c11f8fab..5bc9547a7 100644
--- a/sources/Service/Router/Router.php
+++ b/sources/Service/Router/Router.php
@@ -40,6 +40,11 @@ class Router
 		return static::$oSingleton;
 	}
 
+	/**
+	 * @var bool $bUseCache
+	 */
+	protected $bUseCache = null;
+
 	/**********************/
 	/* Non-static methods */
 	/**********************/
@@ -54,6 +59,14 @@ class Router
 		// Don't do anything, we don't want to be initialized
 	}
 
+	/**
+	 * @param bool|null $bUseCache Force cache usage for testing purposes, or leave it null for the default behavior
+	 */
+	public function SetUseCache(?bool $bUseCache): void
+	{
+		$this->bUseCache = $bUseCache;
+	}
+
 	/**
 	 * Generate a complete URL for a specific route and optional parameters
 	 *
@@ -137,7 +150,7 @@ class Router
 	public function GetRoutes(): array
 	{
 		$aRoutes = [];
-		$bUseCache = false === utils::IsDevelopmentEnvironment();
+		$bUseCache = is_null($this->bUseCache) ? (false === utils::IsDevelopmentEnvironment()) : $this->bUseCache;
 		$bMustWriteCache = false;
 		$sCacheFilePath = $this->GetCacheFileAbsPath();
 
diff --git a/tests/php-unit-tests/unitary-tests/sources/Service/Router/RouterTest.php b/tests/php-unit-tests/unitary-tests/sources/Service/Router/RouterTest.php
index 4fb061163..7c1a3ca29 100644
--- a/tests/php-unit-tests/unitary-tests/sources/Service/Router/RouterTest.php
+++ b/tests/php-unit-tests/unitary-tests/sources/Service/Router/RouterTest.php
@@ -28,6 +28,10 @@ class RouterTest extends ItopDataTestCase
 		parent::setUp();
 
 		$this->RequireOnceItopFile('setup/setuputils.class.inc.php');
+
+		// Speedup test by forcing the use of the cache, even on a development environment
+		$oRouter = Router::GetInstance();
+		$oRouter->SetUseCache(true);
 	}
 
 	/**
@@ -203,12 +207,9 @@ class RouterTest extends ItopDataTestCase
 			$this->fail("Cache file was not generated ($sRoutesCacheFilePath)");
 		}
 
-		clearstatcache();
-		$iFirstModificationTimestamp = filemtime($sRoutesCacheFilePath);
-		$this->debug("Initial timestamp: $iFirstModificationTimestamp");
-
-		// Wait for just 1s to ensure timestamps would be different is the file is re-generated
-		sleep(1);
+		// Set its modification date in the past so that regenerating it will result in a new modification date without any doubt
+		$iFirstModificationTimestamp = time() - 2;
+		touch($sRoutesCacheFilePath, $iFirstModificationTimestamp);
 
 		// Call GetRoutes() again to see if cache gets re-generated or not
 		$this->InvokeNonPublicMethod(Router::class, 'GetRoutes', $oRouter, []);