diff --git a/tests/Unit/Services/QrCodeServiceTest.php b/tests/Unit/Services/QrCodeServiceTest.php
index a725ad08c..b4f6bb87c 100644
--- a/tests/Unit/Services/QrCodeServiceTest.php
+++ b/tests/Unit/Services/QrCodeServiceTest.php
@@ -54,15 +54,95 @@ public function sizeMax(): void
     }
 
     /**
-     * resolveRoundBlockSize() should return \Endroid\QrCode\RoundBlockSizeMode::None
-     * if config('urlhub.qrcode_round_block_size') set `false`.
-     *
      * @test
+     * @group u-actions
      */
-    public function resolveRoundBlockSizeShouldReturnRoundBlockSizeModeNone(): void
+    public function resolveSize(): void
     {
-        config(['urlhub.qrcode_round_block_size' => false]);
+        $size = $this->getQrCode()->resolveSize();
+        $this->assertGreaterThanOrEqual(QrCodeService::MIN_SIZE, $size);
+        $this->assertLessThanOrEqual(QrCodeService::MAX_SIZE, $size);
+    }
+
+    /**
+     * @test
+     * @group u-actions
+     */
+    public function resolveMargin(): void
+    {
+        config(['urlhub.qrcode_margin' => -1]);
+        $this->assertSame(0, $this->getQrCode()->resolveMargin());
+
+        config(['urlhub.qrcode_margin' => 0]);
+        $this->assertSame(0, $this->getQrCode()->resolveMargin());
+
+        config(['urlhub.qrcode_margin' => 1]);
+        $this->assertSame(1, $this->getQrCode()->resolveMargin());
+    }
+
+    /**
+     * @test
+     * @group u-actions
+     */
+    public function resolveWriter(): void
+    {
+        config(['urlhub.qrcode_format' => 'svg']);
+        $this->assertInstanceOf(
+            \Endroid\QrCode\Writer\SvgWriter::class,
+            $this->getQrCode()->resolveWriter()
+        );
+
+        config(['urlhub.qrcode_format' => 'png']);
+        $this->assertInstanceOf(
+            \Endroid\QrCode\Writer\PngWriter::class,
+            $this->getQrCode()->resolveWriter()
+        );
+    }
+
+    /**
+     * @test
+     * @group u-actions
+     */
+    public function resolveErrorCorrection(): void
+    {
+        config(['urlhub.qrcode_error_correction' => 'l']);
+        $this->assertSame(
+            \Endroid\QrCode\ErrorCorrectionLevel::Low,
+            $this->getQrCode()->resolveErrorCorrection()
+        );
 
+        config(['urlhub.qrcode_error_correction' => 'm']);
+        $this->assertSame(
+            \Endroid\QrCode\ErrorCorrectionLevel::Medium,
+            $this->getQrCode()->resolveErrorCorrection()
+        );
+
+        config(['urlhub.qrcode_error_correction' => 'q']);
+        $this->assertSame(
+            \Endroid\QrCode\ErrorCorrectionLevel::Quartile,
+            $this->getQrCode()->resolveErrorCorrection()
+        );
+
+        config(['urlhub.qrcode_error_correction' => 'h']);
+        $this->assertSame(
+            \Endroid\QrCode\ErrorCorrectionLevel::High,
+            $this->getQrCode()->resolveErrorCorrection()
+        );
+    }
+
+    /**
+     * @test
+     * @group u-actions
+     */
+    public function resolveRoundBlockSize(): void
+    {
+        config(['urlhub.qrcode_round_block_size' => true]);
+        $this->assertSame(
+            \Endroid\QrCode\RoundBlockSizeMode::Margin,
+            $this->getQrCode()->resolveRoundBlockSize()
+        );
+
+        config(['urlhub.qrcode_round_block_size' => false]);
         $this->assertSame(
             \Endroid\QrCode\RoundBlockSizeMode::None,
             $this->getQrCode()->resolveRoundBlockSize()