diff --git a/tests/Math/Functions/FunctionsTest.php b/tests/Math/Functions/FunctionsTest.php
index f88839b89..517231cb1 100644
--- a/tests/Math/Functions/FunctionsTest.php
+++ b/tests/Math/Functions/FunctionsTest.php
@@ -68,4 +68,29 @@ class FunctionsTest extends \PHPUnit\Framework\TestCase
         self::assertEquals(5, Functions::getRelativeDegree(12, 12, 7));
         self::assertEquals(11, Functions::getRelativeDegree(6, 12, 7));
     }
+    
+    public function testPower()
+    {
+        self::assertEquals(
+            [4, 9, 16],
+            Functions::powerInt([2, 3, 4], 2)
+        );
+        
+        self::assertEquals(
+            [8, 27, 64],
+            Functions::powerInt([2, 3, 4], 3)
+        );
+        
+        self::assertEquals(
+            [2, 3, 8],
+            Functions::powerInt([4, 9, 16], 1/2),
+            '', 0.0
+        );
+        
+        self::assertEquals(
+            [2, 3, 8],
+            Functions::powerInt([8, 27, 64], 1/3),
+            '', 0.0
+        );
+    }
 }