diff --git a/src/TestSessionEnvironment.php b/src/TestSessionEnvironment.php
index 89443dc..f6fcb09 100644
--- a/src/TestSessionEnvironment.php
+++ b/src/TestSessionEnvironment.php
@@ -573,11 +573,11 @@ class TestSessionEnvironment
      */
     public function waitForPendingRequests($await = 700, $timeout = 10000)
     {
-        $timeout = TestSessionState::microtime() + $timeout;
+        $timeout = TestSessionState::millitime() + $timeout;
         $interval = max(300, $await);
 
         do {
-            $now = TestSessionState::microtime();
+            $now = TestSessionState::millitime();
 
             if ($timeout < $now) {
                 return false;
diff --git a/src/TestSessionState.php b/src/TestSessionState.php
index 1afd494..7cc3835 100644
--- a/src/TestSessionState.php
+++ b/src/TestSessionState.php
@@ -53,7 +53,7 @@ class TestSessionState extends DataObject
         $update = SQLUpdate::create(sprintf('"%s"', $schema->tableName(self::class)))
                 ->addWhere(['ID' => 1])
                 ->assignSQL('"PendingRequests"', '"PendingRequests" - 1')
-                ->assign('"LastResponseTimestamp"', self::microtime());
+                ->assign('"LastResponseTimestamp"', self::millitime());
 
         $update->execute();
     }
@@ -63,7 +63,7 @@ class TestSessionState extends DataObject
      *
      * @return float milliseconds since 1970
      */
-    public static function microtime()
+    public static function millitime()
     {
         return round(microtime(true) * 1000);
     }