diff --git a/src/PhpWord/Style/TextBox.php b/src/PhpWord/Style/TextBox.php
index e43e6fa2..341d9306 100644
--- a/src/PhpWord/Style/TextBox.php
+++ b/src/PhpWord/Style/TextBox.php
@@ -2,10 +2,8 @@
 /**
  * This file is part of PHPWord - A pure PHP library for reading and writing
  * word processing documents.
- *
  * PHPWord is free software distributed under the terms of the GNU Lesser
  * General Public License version 3 as published by the Free Software Foundation.
- *
  * For the full copyright and license information, please read the LICENSE
  * file that was distributed with this source code. For the full list of
  * contributors, visit https://github.com/PHPOffice/PHPWord/contributors.
@@ -27,121 +25,128 @@ class TextBox extends Image
     /**
      * margin top.
      *
-     * @var int
+     * @var null|int
      */
     private $innerMarginTop;
 
     /**
      * margin left.
      *
-     * @var int
+     * @var null|int
      */
     private $innerMarginLeft;
 
     /**
      * margin right.
      *
-     * @var int
+     * @var null|int
      */
     private $innerMarginRight;
 
     /**
      * Cell margin bottom.
      *
-     * @var int
+     * @var null|int
      */
     private $innerMarginBottom;
 
     /**
      * border size.
      *
-     * @var int
+     * @var null|int
      */
     private $borderSize;
 
     /**
      * border color.
      *
-     * @var string
+     * @var null|string
      */
     private $borderColor;
 
     /**
-     * Set margin top.
+     * background color.
      *
-     * @param int $value
+     * @var null|string
      */
-    public function setInnerMarginTop($value = null): void
+    private $bgColor;
+
+    /**
+     * Set background color.
+     */
+    public function setBgColor(?string $value = null): void
+    {
+        $this->bgColor = $value;
+    }
+
+    /**
+     * Get background color.
+     */
+    public function getBgColor(): ?string
+    {
+        return $this->bgColor;
+    }
+
+    /**
+     * Set margin top.
+     */
+    public function setInnerMarginTop(?int $value = null): void
     {
         $this->innerMarginTop = $value;
     }
 
     /**
      * Get margin top.
-     *
-     * @return int
      */
-    public function getInnerMarginTop()
+    public function getInnerMarginTop(): ?int
     {
         return $this->innerMarginTop;
     }
 
     /**
      * Set margin left.
-     *
-     * @param int $value
      */
-    public function setInnerMarginLeft($value = null): void
+    public function setInnerMarginLeft(?int $value = null): void
     {
         $this->innerMarginLeft = $value;
     }
 
     /**
      * Get margin left.
-     *
-     * @return int
      */
-    public function getInnerMarginLeft()
+    public function getInnerMarginLeft(): ?int
     {
         return $this->innerMarginLeft;
     }
 
     /**
      * Set margin right.
-     *
-     * @param int $value
      */
-    public function setInnerMarginRight($value = null): void
+    public function setInnerMarginRight(?int $value = null): void
     {
         $this->innerMarginRight = $value;
     }
 
     /**
      * Get margin right.
-     *
-     * @return int
      */
-    public function getInnerMarginRight()
+    public function getInnerMarginRight(): ?int
     {
         return $this->innerMarginRight;
     }
 
     /**
      * Set margin bottom.
-     *
-     * @param int $value
      */
-    public function setInnerMarginBottom($value = null): void
+    public function setInnerMarginBottom(?int $value = null): void
     {
         $this->innerMarginBottom = $value;
     }
 
     /**
      * Get margin bottom.
-     *
-     * @return int
      */
-    public function getInnerMarginBottom()
+    public function getInnerMarginBottom(): ?int
     {
         return $this->innerMarginBottom;
     }
@@ -149,9 +154,9 @@ class TextBox extends Image
     /**
      * Set TLRB cell margin.
      *
-     * @param int $value Margin in twips
+     * @param null|int $value Margin in twips
      */
-    public function setInnerMargin($value = null): void
+    public function setInnerMargin(?int $value = null): void
     {
         $this->setInnerMarginTop($value);
         $this->setInnerMarginLeft($value);
@@ -164,17 +169,15 @@ class TextBox extends Image
      *
      * @return int[]
      */
-    public function getInnerMargin()
+    public function getInnerMargin(): array
     {
         return [$this->innerMarginLeft, $this->innerMarginTop, $this->innerMarginRight, $this->innerMarginBottom];
     }
 
     /**
      * Has inner margin?
-     *
-     * @return bool
      */
-    public function hasInnerMargins()
+    public function hasInnerMargins(): bool
     {
         $hasInnerMargins = false;
         $margins = $this->getInnerMargin();
@@ -191,39 +194,33 @@ class TextBox extends Image
     /**
      * Set border size.
      *
-     * @param int $value Size in points
+     * @param null|int $value Size in points
      */
-    public function setBorderSize($value = null): void
+    public function setBorderSize(?int $value = null): void
     {
         $this->borderSize = $value;
     }
 
     /**
      * Get border size.
-     *
-     * @return int
      */
-    public function getBorderSize()
+    public function getBorderSize(): ?int
     {
         return $this->borderSize;
     }
 
     /**
      * Set border color.
-     *
-     * @param string $value
      */
-    public function setBorderColor($value = null): void
+    public function setBorderColor(?string $value = null): void
     {
         $this->borderColor = $value;
     }
 
     /**
      * Get border color.
-     *
-     * @return string
      */
-    public function getBorderColor()
+    public function getBorderColor(): ?string
     {
         return $this->borderColor;
     }
diff --git a/src/PhpWord/Writer/Word2007/Element/TextBox.php b/src/PhpWord/Writer/Word2007/Element/TextBox.php
index d264f084..ff94094d 100644
--- a/src/PhpWord/Writer/Word2007/Element/TextBox.php
+++ b/src/PhpWord/Writer/Word2007/Element/TextBox.php
@@ -2,10 +2,8 @@
 /**
  * This file is part of PHPWord - A pure PHP library for reading and writing
  * word processing documents.
- *
  * PHPWord is free software distributed under the terms of the GNU Lesser
  * General Public License version 3 as published by the Free Software Foundation.
- *
  * For the full copyright and license information, please read the LICENSE
  * file that was distributed with this source code. For the full list of
  * contributors, visit https://github.com/PHPOffice/PHPWord/contributors.
@@ -50,6 +48,10 @@ class TextBox extends Image
         $xmlWriter->startElement('v:shape');
         $xmlWriter->writeAttribute('type', '#_x0000_t0202');
 
+        if ($style->getBgColor()) {
+            $xmlWriter->writeAttribute('fillcolor', $style->getBgColor());
+        }
+
         $styleWriter->write();
         $styleWriter->writeBorder();
 
diff --git a/src/PhpWord/Writer/Word2007/Style/TextBox.php b/src/PhpWord/Writer/Word2007/Style/TextBox.php
index 6aa6b019..d5ccf7a8 100644
--- a/src/PhpWord/Writer/Word2007/Style/TextBox.php
+++ b/src/PhpWord/Writer/Word2007/Style/TextBox.php
@@ -2,10 +2,8 @@
 /**
  * This file is part of PHPWord - A pure PHP library for reading and writing
  * word processing documents.
- *
  * PHPWord is free software distributed under the terms of the GNU Lesser
  * General Public License version 3 as published by the Free Software Foundation.
- *
  * For the full copyright and license information, please read the LICENSE
  * file that was distributed with this source code. For the full list of
  * contributors, visit https://github.com/PHPOffice/PHPWord/contributors.
diff --git a/tests/PhpWordTests/Style/TextBoxTest.php b/tests/PhpWordTests/Style/TextBoxTest.php
index 3c1c2436..284829aa 100644
--- a/tests/PhpWordTests/Style/TextBoxTest.php
+++ b/tests/PhpWordTests/Style/TextBoxTest.php
@@ -2,10 +2,8 @@
 /**
  * This file is part of PHPWord - A pure PHP library for reading and writing
  * word processing documents.
- *
  * PHPWord is free software distributed under the terms of the GNU Lesser
  * General Public License version 3 as published by the Free Software Foundation.
- *
  * For the full copyright and license information, please read the LICENSE
  * file that was distributed with this source code. For the full list of
  * contributors, visit https://github.com/PHPOffice/PHPWord/contributors.
@@ -20,15 +18,15 @@ namespace PhpOffice\PhpWordTests\Style;
 use InvalidArgumentException;
 use PhpOffice\PhpWord\SimpleType\Jc;
 use PhpOffice\PhpWord\Style\TextBox;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Test class for PhpOffice\PhpWord\Style\Image.
  *
  * @coversDefaultClass \PhpOffice\PhpWord\Style\Image
- *
  * @runTestsInSeparateProcesses
  */
-class TextBoxTest extends \PHPUnit\Framework\TestCase
+class TextBoxTest extends TestCase
 {
     /**
      * Test setting style with normal value.
@@ -55,6 +53,7 @@ class TextBoxTest extends \PHPUnit\Framework\TestCase
             'innerMarginLeft' => '5',
             'borderSize' => '2',
             'borderColor' => 'red',
+            'bgColor' => 'blue',
         ];
         foreach ($properties as $key => $value) {
             $set = "set{$key}";
@@ -89,6 +88,7 @@ class TextBoxTest extends \PHPUnit\Framework\TestCase
             'innerMarginLeft' => '5',
             'borderSize' => '2',
             'borderColor' => 'red',
+            'bgColor' => 'blue',
         ];
         foreach ($properties as $key => $value) {
             $get = "get{$key}";
@@ -305,4 +305,15 @@ class TextBoxTest extends \PHPUnit\Framework\TestCase
         $object->setBorderColor($expected);
         self::assertEquals($expected, $object->getBorderColor());
     }
+
+    /**
+     * Test set/get bgColor.
+     */
+    public function testSetGetBgColor(): void
+    {
+        $expected = 'blue';
+        $object = new TextBox();
+        $object->setBgColor($expected);
+        self::assertEquals($expected, $object->getBgColor());
+    }
 }
diff --git a/tests/PhpWordTests/Writer/Word2007/Part/DocumentTest.php b/tests/PhpWordTests/Writer/Word2007/Part/DocumentTest.php
index 98449f3b..be8f8cc4 100644
--- a/tests/PhpWordTests/Writer/Word2007/Part/DocumentTest.php
+++ b/tests/PhpWordTests/Writer/Word2007/Part/DocumentTest.php
@@ -2,10 +2,8 @@
 /**
  * This file is part of PHPWord - A pure PHP library for reading and writing
  * word processing documents.
- *
  * PHPWord is free software distributed under the terms of the GNU Lesser
  * General Public License version 3 as published by the Free Software Foundation.
- *
  * For the full copyright and license information, please read the LICENSE
  * file that was distributed with this source code. For the full list of
  * contributors, visit https://github.com/PHPOffice/PHPWord/contributors.
@@ -61,11 +59,11 @@ class DocumentTest extends \PHPUnit\Framework\TestCase
         $doc = TestHelperDOCX::getDocument($phpWord);
         self::assertNotNull($doc);
 
-//         $this->assertTrue($doc->elementExists('/Properties/property[name="key1"]/vt:lpwstr'));
-//         $this->assertTrue($doc->elementExists('/Properties/property[name="key2"]/vt:bool'));
-//         $this->assertTrue($doc->elementExists('/Properties/property[name="key3"]/vt:i4'));
-//         $this->assertTrue($doc->elementExists('/Properties/property[name="key4"]/vt:r8'));
-//         $this->assertTrue($doc->elementExists('/Properties/property[name="key5"]/vt:lpwstr'));
+        //         $this->assertTrue($doc->elementExists('/Properties/property[name="key1"]/vt:lpwstr'));
+        //         $this->assertTrue($doc->elementExists('/Properties/property[name="key2"]/vt:bool'));
+        //         $this->assertTrue($doc->elementExists('/Properties/property[name="key3"]/vt:i4'));
+        //         $this->assertTrue($doc->elementExists('/Properties/property[name="key4"]/vt:r8'));
+        //         $this->assertTrue($doc->elementExists('/Properties/property[name="key5"]/vt:lpwstr'));
     }
 
     /**
@@ -408,7 +406,13 @@ class DocumentTest extends \PHPUnit\Framework\TestCase
         // behind
         $element = $doc->getElement('/w:document/w:body/w:p[2]/w:r/w:pict/v:shape');
         $style = $element->getAttribute('style');
-        self::assertRegExp('/z\-index:\-[0-9]*/', $style);
+
+        // Try to address CI coverage issue for PHP 7.1 and 7.2 when using regex match assertions
+        if (method_exists(static::class, 'assertRegExp')) {
+            self::assertRegExp('/z\-index:\-[0-9]*/', $style);
+        } else {
+            self::assertMatchesRegularExpression('/z\-index:\-[0-9]*/', $style);
+        }
 
         // square
         $element = $doc->getElement('/w:document/w:body/w:p[4]/w:r/w:pict/v:shape/w10:wrap');
@@ -551,7 +555,13 @@ class DocumentTest extends \PHPUnit\Framework\TestCase
         $cell->addText('Test');
 
         $doc = TestHelperDOCX::getDocument($phpWord);
-        self::assertEquals(Cell::DEFAULT_BORDER_COLOR, $doc->getElementAttribute('/w:document/w:body/w:tbl/w:tr/w:tc/w:tcPr/w:tcBorders/w:top', 'w:color'));
+        self::assertEquals(
+            Cell::DEFAULT_BORDER_COLOR,
+            $doc->getElementAttribute(
+                '/w:document/w:body/w:tbl/w:tr/w:tc/w:tcPr/w:tcBorders/w:top',
+                'w:color'
+            )
+        );
     }
 
     /**