diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/ForwardCompatTestTraitForV5.php b/src/Symfony/Bridge/PhpUnit/Legacy/ForwardCompatTestTraitForV5.php
index 3597ac0c623b..29c019a82e58 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/ForwardCompatTestTraitForV5.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/ForwardCompatTestTraitForV5.php
@@ -235,6 +235,54 @@ public static function assertIsIterable($actual, $message = '')
         static::assertInternalType('iterable', $actual, $message);
     }
 
+    /**
+     * @param string $message
+     *
+     * @return void
+     */
+    public static function assertFinite($actual, $message = '')
+    {
+        if (\is_callable('parent::assertFinite')) {
+            parent::assertFinite($actual, $message);
+
+            return;
+        }
+        static::assertInternalType('float', $actual, $message);
+        static::assertTrue(is_finite($actual), $message ? $message : "Failed asserting that $actual is finite.");
+    }
+
+    /**
+     * @param string $message
+     *
+     * @return void
+     */
+    public static function assertInfinite($actual, $message = '')
+    {
+        if (\is_callable('parent::assertInfinite')) {
+            parent::assertInfinite($actual, $message);
+
+            return;
+        }
+        static::assertInternalType('float', $actual, $message);
+        static::assertTrue(is_infinite($actual), $message ? $message : "Failed asserting that $actual is infinite.");
+    }
+
+    /**
+     * @param string $message
+     *
+     * @return void
+     */
+    public static function assertNan($actual, $message = '')
+    {
+        if (\is_callable('parent::assertNan')) {
+            parent::assertNan($actual, $message);
+
+            return;
+        }
+        static::assertInternalType('float', $actual, $message);
+        static::assertTrue(is_nan($actual), $message ? $message : "Failed asserting that $actual is nan.");
+    }
+
     /**
      * @param string $exception
      *