diff --git a/lib/internal/Magento/Framework/Pricing/Render/PriceBox.php b/lib/internal/Magento/Framework/Pricing/Render/PriceBox.php
index 39422210750cc..75ef83775741d 100644
--- a/lib/internal/Magento/Framework/Pricing/Render/PriceBox.php
+++ b/lib/internal/Magento/Framework/Pricing/Render/PriceBox.php
@@ -86,7 +86,7 @@ public function getCacheKey()
      */
     protected function getCacheLifetime()
     {
-        return parent::hasCacheLifetime() ? parent::getCacheLifetime() : self::DEFAULT_LIFETIME;
+        return parent::hasCacheLifetime() ? parent::getCacheLifetime() : null;
     }
     
     /**
diff --git a/lib/internal/Magento/Framework/Pricing/Test/Unit/Render/PriceBoxTest.php b/lib/internal/Magento/Framework/Pricing/Test/Unit/Render/PriceBoxTest.php
index af6ef0a099584..1f1fe3dff15ea 100644
--- a/lib/internal/Magento/Framework/Pricing/Test/Unit/Render/PriceBoxTest.php
+++ b/lib/internal/Magento/Framework/Pricing/Test/Unit/Render/PriceBoxTest.php
@@ -233,4 +233,17 @@ public function testGetRendererPool()
     {
         $this->assertEquals($this->rendererPool, $this->model->getRendererPool());
     }
+
+    /**
+     * This tests ensures that protected method getCacheLifetime() returns a null value when cacheLifeTime is not
+     * explicitly set in the parent block
+     */
+    public function testCacheLifetime()
+    {
+        $reflectionClass = new \ReflectionClass(get_class($this->model));
+        $methodReflection = $reflectionClass->getMethod('getCacheLifetime');
+        $methodReflection->setAccessible(true);
+        $cacheLifeTime = $methodReflection->invoke($this->model);
+        $this->assertNull($cacheLifeTime, 'Expected null cache lifetime');
+    }
 }