diff --git a/generator/tests/DateTimeImmutableTest.php b/generator/tests/DateTimeImmutableTest.php
index 4ae5ad38..b4c49e7e 100644
--- a/generator/tests/DateTimeImmutableTest.php
+++ b/generator/tests/DateTimeImmutableTest.php
@@ -153,4 +153,16 @@ public function testComparaison(): void
         $b = $phpDateTime->modify('+3 hours') < $phpDateTime->add($timeLimit);
         $this->assertEquals($b, $a);
     }
+
+    public function testEquals(): void
+    {
+        $phpDateTime = new \DateTimeImmutable();
+
+        $safeDateTime1 = \Safe\DateTimeImmutable::createFromFormat('Y-m-d H:i:s.u', $phpDateTime->format('Y-m-d H:i:s.u'));
+        $safeDateTime2 = new \Safe\DateTimeImmutable($safeDateTime1->format('Y-m-d H:i:s.u'));
+
+        $this->assertEquals($phpDateTime, $safeDateTime1);
+        $this->assertEquals($phpDateTime, $safeDateTime2);
+        $this->assertEquals($safeDateTime1, $safeDateTime2);
+    }
 }
\ No newline at end of file
diff --git a/lib/DateTime.php b/lib/DateTime.php
index 40cb7595..b3778d4b 100644
--- a/lib/DateTime.php
+++ b/lib/DateTime.php
@@ -13,7 +13,7 @@ class DateTime extends \DateTime
     //switch from regular datetime to safe version
     private static function createFromRegular(\DateTime $datetime): self
     {
-        return new self($datetime->format('Y-m-d H:i:s'), $datetime->getTimezone());
+        return new self($datetime->format('Y-m-d H:i:s.u'), $datetime->getTimezone());
     }
 
     /**
diff --git a/lib/DateTimeImmutable.php b/lib/DateTimeImmutable.php
index a0956492..948b8f0f 100644
--- a/lib/DateTimeImmutable.php
+++ b/lib/DateTimeImmutable.php
@@ -35,7 +35,7 @@ public function __construct($time = 'now', $timezone = null)
     //switch from regular datetime to safe version
     private static function createFromRegular(\DateTimeImmutable $datetime): self
     {
-        $safeDatetime = new self($datetime->format('Y-m-d H:i:s'), $datetime->getTimezone()); //we need to also update the wrapper to not break the operators '<' and '>'
+        $safeDatetime = new self($datetime->format('Y-m-d H:i:s.u'), $datetime->getTimezone()); //we need to also update the wrapper to not break the operators '<' and '>'
         $safeDatetime->innerDateTime = $datetime;
         return $safeDatetime;
     }