diff --git a/Magento2/Sniffs/Classes/AbstractApiSniff.php b/Magento2/Sniffs/Classes/AbstractApiSniff.php
index ac5836d8..13947186 100644
--- a/Magento2/Sniffs/Classes/AbstractApiSniff.php
+++ b/Magento2/Sniffs/Classes/AbstractApiSniff.php
@@ -48,6 +48,9 @@ public function process(File $phpcsFile, $stackPtr)
         }
 
         $commentStartPtr = $phpcsFile->findPrevious(T_DOC_COMMENT_OPEN_TAG, $stackPtr - 1, 0);
+        if ($commentStartPtr === false) {
+            return;
+        }
         $commentCloserPtr = $tokens[$commentStartPtr]['comment_closer'];
 
         for ($i = $commentStartPtr; $i <= $commentCloserPtr; $i++) {
diff --git a/Magento2/Tests/Classes/AbstractApiUnitTest.inc b/Magento2/Tests/Classes/AbstractApiUnitTest.1.inc
similarity index 99%
rename from Magento2/Tests/Classes/AbstractApiUnitTest.inc
rename to Magento2/Tests/Classes/AbstractApiUnitTest.1.inc
index 92d5edee..178611fb 100644
--- a/Magento2/Tests/Classes/AbstractApiUnitTest.inc
+++ b/Magento2/Tests/Classes/AbstractApiUnitTest.1.inc
@@ -28,7 +28,6 @@ class FooBar implements FooInterface
 
 }
 
-
 /**
  * Class Bar
  */
diff --git a/Magento2/Tests/Classes/AbstractApiUnitTest.2.inc b/Magento2/Tests/Classes/AbstractApiUnitTest.2.inc
new file mode 100644
index 00000000..5cd3d5b0
--- /dev/null
+++ b/Magento2/Tests/Classes/AbstractApiUnitTest.2.inc
@@ -0,0 +1,6 @@
+<?php
+
+abstract class FooNoComment implements FooInterface
+{
+
+}
diff --git a/Magento2/Tests/Classes/AbstractApiUnitTest.php b/Magento2/Tests/Classes/AbstractApiUnitTest.php
index 29a73068..d1c6eebe 100644
--- a/Magento2/Tests/Classes/AbstractApiUnitTest.php
+++ b/Magento2/Tests/Classes/AbstractApiUnitTest.php
@@ -23,11 +23,15 @@ public function getErrorList()
     /**
      * @inheritdoc
      */
-    public function getWarningList()
+    public function getWarningList($testFile = '')
     {
-        return [
-            14 => 1,
-            23 => 1
-        ];
+        if ($testFile === 'AbstractApiUnitTest.1.inc') {
+            return [
+                14 => 1,
+                23 => 1
+            ];
+        }
+
+        return [];
     }
 }