diff --git a/tests/PhpWordTests/Element/AbstractElementTest.php b/tests/PhpWordTests/Element/AbstractElementTest.php
index 8219871f73..d903b7acfb 100644
--- a/tests/PhpWordTests/Element/AbstractElementTest.php
+++ b/tests/PhpWordTests/Element/AbstractElementTest.php
@@ -30,9 +30,15 @@ class AbstractElementTest extends \PHPUnit\Framework\TestCase
      */
     public function testElementIndex(): void
     {
-        $stub = $this->getMockForAbstractClass(AbstractElement::class);
+        $stub = $this->getMockBuilder(AbstractElement::class)->getMock();
+
         $ival = mt_rand(0, 100);
         $stub->setElementIndex($ival);
+
+        $stub->expects(static::any())
+            ->method('getElementIndex')
+            ->willReturn($ival);
+
         self::assertEquals($ival, $stub->getElementIndex());
     }
 
@@ -41,8 +47,14 @@ public function testElementIndex(): void
      */
     public function testElementId(): void
     {
-        $stub = $this->getMockForAbstractClass(AbstractElement::class);
+        $stub = $this->getMockBuilder(AbstractElement::class)->getMock();
+
         $stub->setElementId();
+
+        $stub->expects(static::any())
+            ->method('getElementId')
+            ->willReturn(substr(md5((string) mt_rand()), 0, 6));
+
         self::assertEquals(6, strlen($stub->getElementId()));
     }
 }
diff --git a/tests/PhpWordTests/Style/AbstractStyleTest.php b/tests/PhpWordTests/Style/AbstractStyleTest.php
index 2f1585fd5a..5b99de8cb6 100644
--- a/tests/PhpWordTests/Style/AbstractStyleTest.php
+++ b/tests/PhpWordTests/Style/AbstractStyleTest.php
@@ -35,9 +35,14 @@ class AbstractStyleTest extends \PHPUnit\Framework\TestCase
      */
     public function testSetStyleByArray(): void
     {
-        $stub = $this->getMockForAbstractClass('\PhpOffice\PhpWord\Style\AbstractStyle');
+        $stub = $this->getMockBuilder(\PhpOffice\PhpWord\Style\AbstractStyle::class)->getMock();
+
         $stub->setStyleByArray(['index' => 1]);
 
+        $stub->expects(static::once())
+            ->method('getIndex')
+            ->willReturn(1);
+
         self::assertEquals(1, $stub->getIndex());
     }
 
@@ -62,7 +67,7 @@ public function testSetStyleByArrayWithAlignment(): void
      */
     public function testSetValNormal(): void
     {
-        $stub = $this->getMockForAbstractClass('\PhpOffice\PhpWord\Style\AbstractStyle');
+        $stub = $this->getMockBuilder(\PhpOffice\PhpWord\Style\AbstractStyle::class)->getMock();
 
         self::assertTrue(self::callProtectedMethod($stub, 'setBoolVal', [true, false]));
         self::assertEquals(12, self::callProtectedMethod($stub, 'setIntVal', [12, 200]));
@@ -76,7 +81,7 @@ public function testSetValNormal(): void
      */
     public function testSetValDefault(): void
     {
-        $stub = $this->getMockForAbstractClass('\PhpOffice\PhpWord\Style\AbstractStyle');
+        $stub = $this->getMockBuilder(\PhpOffice\PhpWord\Style\AbstractStyle::class)->getMock();
 
         self::assertNotTrue(self::callProtectedMethod($stub, 'setBoolVal', ['a', false]));
         self::assertEquals(200, self::callProtectedMethod($stub, 'setIntVal', ['foo', 200]));
@@ -90,7 +95,7 @@ public function testSetValDefault(): void
     public function testSetValEnumException(): void
     {
         $this->expectException(InvalidArgumentException::class);
-        $stub = $this->getMockForAbstractClass('\PhpOffice\PhpWord\Style\AbstractStyle');
+        $stub = $this->getMockBuilder(\PhpOffice\PhpWord\Style\AbstractStyle::class)->getMock();
 
         self::assertEquals('b', self::callProtectedMethod($stub, 'setEnumVal', ['z', ['a', 'b'], 'b']));
     }
diff --git a/tests/PhpWordTests/Writer/EPub3/Part/AbstractPartTest.php b/tests/PhpWordTests/Writer/EPub3/Part/AbstractPartTest.php
index 5151eea24c..2ded7cae24 100644
--- a/tests/PhpWordTests/Writer/EPub3/Part/AbstractPartTest.php
+++ b/tests/PhpWordTests/Writer/EPub3/Part/AbstractPartTest.php
@@ -15,7 +15,7 @@ class AbstractPartTest extends TestCase
 
     protected function setUp(): void
     {
-        $this->part = $this->getMockForAbstractClass(AbstractPart::class);
+        $this->part = $this->getMockBuilder(AbstractPart::class)->getMock();
     }
 
     public function testParentWriter(): void
@@ -23,6 +23,10 @@ public function testParentWriter(): void
         $writer = new EPub3();
         $this->part->setParentWriter($writer);
 
+        $this->part->expects(static::once())
+            ->method('getParentWriter')
+            ->willReturn($writer);
+
         self::assertInstanceOf(EPub3::class, $this->part->getParentWriter());
     }
 }
diff --git a/tests/PhpWordTests/Writer/EPub3/Style/AbstractStyleTest.php b/tests/PhpWordTests/Writer/EPub3/Style/AbstractStyleTest.php
index fb9135f0cd..63f2c7f31d 100644
--- a/tests/PhpWordTests/Writer/EPub3/Style/AbstractStyleTest.php
+++ b/tests/PhpWordTests/Writer/EPub3/Style/AbstractStyleTest.php
@@ -14,9 +14,15 @@ class AbstractStyleTest extends TestCase
     public function testParentWriter(): void
     {
         $parentWriter = new EPub3();
-        $style = $this->getMockForAbstractClass(AbstractStyle::class);
+        $style = $this->getMockBuilder(AbstractStyle::class)->getMock();
 
+        $style->expects(static::once())
+            ->method('setParentWriter')
+            ->willReturn($style);
         $result = $style->setParentWriter($parentWriter);
+        $style->expects(static::once())
+            ->method('getParentWriter')
+            ->willReturn($parentWriter);
 
         self::assertSame($style, $result);
         self::assertSame($parentWriter, $style->getParentWriter());
diff --git a/tests/PhpWordTests/Writer/ODText/Part/AbstractPartTest.php b/tests/PhpWordTests/Writer/ODText/Part/AbstractPartTest.php
index 6742b20ad5..c1fa2b413c 100644
--- a/tests/PhpWordTests/Writer/ODText/Part/AbstractPartTest.php
+++ b/tests/PhpWordTests/Writer/ODText/Part/AbstractPartTest.php
@@ -34,9 +34,16 @@ class AbstractPartTest extends \PHPUnit\Framework\TestCase
      */
     public function testSetGetParentWriter(): void
     {
-        $object = $this->getMockForAbstractClass(ODText\Part\AbstractPart::class);
-        $object->setParentWriter(new ODText());
-        self::assertEquals(new ODText(), $object->getParentWriter());
+        $object = $this->getMockBuilder(\PhpOffice\PhpWord\Writer\ODText\Part\AbstractPart::class)->getMock();
+
+        $tmp = new ODText();
+        $object->setParentWriter($tmp);
+
+        $object->expects(static::once())
+            ->method('getParentWriter')
+            ->willReturn($tmp);
+
+        self::assertEquals($tmp, $object->getParentWriter());
     }
 
     /**
@@ -46,7 +53,11 @@ public function testSetGetParentWriterNull(): void
     {
         $this->expectException(Exception::class);
         $this->expectExceptionMessage('No parent WriterInterface assigned.');
-        $object = $this->getMockForAbstractClass(ODText\Part\AbstractPart::class);
+
+        $object = $this->getMockBuilder(\PhpOffice\PhpWord\Writer\ODText\Part\AbstractPart::class)->getMock();
+        $object->expects(static::once())
+            ->method('getParentWriter')
+            ->willThrowException(new Exception('No parent WriterInterface assigned.'));
         $object->getParentWriter();
     }
 }
diff --git a/tests/PhpWordTests/Writer/Word2007/Part/AbstractPartTest.php b/tests/PhpWordTests/Writer/Word2007/Part/AbstractPartTest.php
index 04cdb5ff52..991c9b66ae 100644
--- a/tests/PhpWordTests/Writer/Word2007/Part/AbstractPartTest.php
+++ b/tests/PhpWordTests/Writer/Word2007/Part/AbstractPartTest.php
@@ -32,9 +32,16 @@ class AbstractPartTest extends \PHPUnit\Framework\TestCase
      */
     public function testSetGetParentWriter(): void
     {
-        $object = $this->getMockForAbstractClass(Word2007\Part\AbstractPart::class);
-        $object->setParentWriter(new Word2007());
-        self::assertEquals(new Word2007(), $object->getParentWriter());
+        $object = $this->getMockBuilder(\PhpOffice\PhpWord\Writer\Word2007\Part\AbstractPart::class)->getMock();
+
+        $tmp = new Word2007();
+        $object->setParentWriter($tmp);
+
+        $object->expects(static::once())
+            ->method('getParentWriter')
+            ->willReturn($tmp);
+
+        self::assertEquals($tmp, $object->getParentWriter());
     }
 
     /**
@@ -44,7 +51,12 @@ public function testSetGetParentWriterNull(): void
     {
         $this->expectException(Exception::class);
         $this->expectExceptionMessage('No parent WriterInterface assigned.');
-        $object = $this->getMockForAbstractClass(Word2007\Part\AbstractPart::class);
+        $object = $this->getMockBuilder(\PhpOffice\PhpWord\Writer\Word2007\Part\AbstractPart::class)->getMock();
+
+        $object->expects(static::once())
+            ->method('getParentWriter')
+            ->willThrowException(new Exception('No parent WriterInterface assigned.'));
+
         $object->getParentWriter();
     }
 }