diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index 2047cca0c3..051e5eda19 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -25,6 +25,7 @@ Yii Framework 2 Change Log
 - Bug #3311: Fixed the bug that `yii\di\Container::has()` did not return correct value (mgrechanik, qiangxue)
 - Bug #3327: Fixed "Unable to find debug data" when logging objects with circular references (jarekkozak, samdark)
 - Bug #3368: Fix for comparing numeric attributes in JavaScript (technixp)
+- Bug #3393: Fix `yii\helpers\FileHelper::copyDirectory()` pattern not working (klimov-paul)
 - Bug #3431: Allow using extended ErrorHandler class from the app namespace (cebe)
 - Bug #3436: Fixed the issue that `ServiceLocator` still returns the old component after calling `set()` with a new definition (qiangxue)
 - Bug #3458: Fixed the bug that the image rendered by `CaptchaAction` was using a wrong content type (MDMunir, qiangxue)
diff --git a/framework/helpers/BaseFileHelper.php b/framework/helpers/BaseFileHelper.php
index edf81a1df0..731341ff08 100644
--- a/framework/helpers/BaseFileHelper.php
+++ b/framework/helpers/BaseFileHelper.php
@@ -209,6 +209,9 @@ class BaseFileHelper
         if ($handle === false) {
             throw new InvalidParamException('Unable to open directory: ' . $src);
         }
+        if (!isset($options['basePath'])) {
+            $options['basePath'] = realpath($src);
+        }
         while (($file = readdir($handle)) !== false) {
             if ($file === '.' || $file === '..') {
                 continue;
diff --git a/tests/unit/framework/helpers/FileHelperTest.php b/tests/unit/framework/helpers/FileHelperTest.php
index 3eb8f35e1c..d013133eb3 100644
--- a/tests/unit/framework/helpers/FileHelperTest.php
+++ b/tests/unit/framework/helpers/FileHelperTest.php
@@ -407,4 +407,42 @@ class FileHelperTest extends TestCase
             FileHelper::localize($viewFile, $currentLanguage, $sourceLanguage)
         );
     }
+
+    /**
+     * @see https://github.com/yiisoft/yii2/issues/3393
+     *
+     * @depends testCopyDirectory
+     * @depends testFindFiles
+     */
+    public function testCopyDirectoryExclude()
+    {
+        $srcDirName = 'test_src_dir';
+        $textFiles = [
+            'file1.txt' => 'text file 1 content',
+            'file2.txt' => 'text file 2 content',
+        ];
+        $dataFiles = [
+            'file1.dat' => 'data file 1 content',
+            'file2.dat' => 'data file 2 content',
+        ];
+        $this->createFileStructure([
+            $srcDirName => array_merge($textFiles, $dataFiles)
+        ]);
+
+        $basePath = $this->testFilePath;
+        $srcDirName = $basePath . DIRECTORY_SEPARATOR . $srcDirName;
+        $dstDirName = $basePath . DIRECTORY_SEPARATOR . 'test_dst_dir';
+
+        FileHelper::copyDirectory($srcDirName, $dstDirName, ['only' => ['*.dat']]);
+
+        $this->assertFileExists($dstDirName, 'Destination directory does not exist!');
+        $copiedFiles = FileHelper::findFiles($dstDirName);
+        $this->assertCount(2, $copiedFiles, 'wrong files count copied');
+
+        foreach ($dataFiles as $name => $content) {
+            $fileName = $dstDirName . DIRECTORY_SEPARATOR . $name;
+            $this->assertFileExists($fileName);
+            $this->assertEquals($content, file_get_contents($fileName), 'Incorrect file content!');
+        }
+    }
 }