diff --git a/src/CSSList/CSSBlockList.php b/src/CSSList/CSSBlockList.php
index 76216279..0f2817c3 100644
--- a/src/CSSList/CSSBlockList.php
+++ b/src/CSSList/CSSBlockList.php
@@ -20,6 +20,19 @@
  */
 abstract class CSSBlockList extends CSSList
 {
+    /**
+     * Gets all `DeclarationBlock` objects recursively, no matter how deeply nested the selectors are.
+     *
+     * @return array<int, DeclarationBlock>
+     */
+    public function getAllDeclarationBlocks(): array
+    {
+        /** @var array<int, DeclarationBlock> $result */
+        $result = [];
+        $this->allDeclarationBlocks($result);
+        return $result;
+    }
+
     /**
      * @param array<int, DeclarationBlock> $result
      */
diff --git a/src/CSSList/Document.php b/src/CSSList/Document.php
index 00d4cabd..06a8064f 100644
--- a/src/CSSList/Document.php
+++ b/src/CSSList/Document.php
@@ -8,7 +8,6 @@
 use Sabberworm\CSS\Parsing\ParserState;
 use Sabberworm\CSS\Parsing\SourceException;
 use Sabberworm\CSS\Property\Selector;
-use Sabberworm\CSS\RuleSet\DeclarationBlock;
 use Sabberworm\CSS\RuleSet\RuleSet;
 use Sabberworm\CSS\Value\Value;
 
@@ -30,19 +29,6 @@ public static function parse(ParserState $parserState): Document
         return $oDocument;
     }
 
-    /**
-     * Gets all `DeclarationBlock` objects recursively, no matter how deeply nested the selectors are.
-     *
-     * @return array<int, DeclarationBlock>
-     */
-    public function getAllDeclarationBlocks(): array
-    {
-        /** @var array<int, DeclarationBlock> $result */
-        $result = [];
-        $this->allDeclarationBlocks($result);
-        return $result;
-    }
-
     /**
      * Returns all `RuleSet` objects recursively found in the tree, no matter how deeply nested the rule sets are.
      *
diff --git a/tests/Unit/CSSList/CSSBlockListTest.php b/tests/Unit/CSSList/CSSBlockListTest.php
index 9d7ef076..b44f7114 100644
--- a/tests/Unit/CSSList/CSSBlockListTest.php
+++ b/tests/Unit/CSSList/CSSBlockListTest.php
@@ -6,9 +6,15 @@
 
 use PHPUnit\Framework\TestCase;
 use Sabberworm\CSS\Comment\Commentable;
+use Sabberworm\CSS\CSSList\AtRuleBlockList;
 use Sabberworm\CSS\CSSList\CSSList;
+use Sabberworm\CSS\Property\Charset;
+use Sabberworm\CSS\Property\Import;
 use Sabberworm\CSS\Renderable;
+use Sabberworm\CSS\RuleSet\DeclarationBlock;
 use Sabberworm\CSS\Tests\Unit\CSSList\Fixtures\ConcreteCSSBlockList;
+use Sabberworm\CSS\Value\CSSString;
+use Sabberworm\CSS\Value\URL;
 
 /**
  * @covers \Sabberworm\CSS\CSSList\CSSBlockList
@@ -45,4 +51,92 @@ public function isCSSList(): void
 
         self::assertInstanceOf(CSSList::class, $subject);
     }
+
+    /**
+     * @test
+     */
+    public function getAllDeclarationBlocksForNoContentsReturnsEmptyArray(): void
+    {
+        $subject = new ConcreteCSSBlockList();
+
+        self::assertSame([], $subject->getAllDeclarationBlocks());
+    }
+
+    /**
+     * @test
+     */
+    public function getAllDeclarationBlocksCanReturnOneDirectDeclarationBlockContent(): void
+    {
+        $subject = new ConcreteCSSBlockList();
+
+        $declarationBlock = new DeclarationBlock();
+        $subject->setContents([$declarationBlock]);
+
+        $result = $subject->getAllDeclarationBlocks();
+
+        self::assertSame([$declarationBlock], $result);
+    }
+
+    /**
+     * @test
+     */
+    public function getAllDeclarationBlocksCanReturnMultipleDirectDeclarationBlockContents(): void
+    {
+        $subject = new ConcreteCSSBlockList();
+
+        $declarationBlock1 = new DeclarationBlock();
+        $declarationBlock2 = new DeclarationBlock();
+        $subject->setContents([$declarationBlock1, $declarationBlock2]);
+
+        $result = $subject->getAllDeclarationBlocks();
+
+        self::assertSame([$declarationBlock1, $declarationBlock2], $result);
+    }
+
+    /**
+     * @test
+     */
+    public function getAllDeclarationBlocksReturnsDeclarationBlocksWithinAtRuleBlockList(): void
+    {
+        $subject = new ConcreteCSSBlockList();
+
+        $declarationBlock = new DeclarationBlock();
+        $atRuleBlockList = new AtRuleBlockList('media');
+        $atRuleBlockList->setContents([$declarationBlock]);
+        $subject->setContents([$atRuleBlockList]);
+
+        $result = $subject->getAllDeclarationBlocks();
+
+        self::assertSame([$declarationBlock], $result);
+    }
+
+    /**
+     * @test
+     */
+    public function getAllDeclarationBlocksIgnoresImport(): void
+    {
+        $subject = new ConcreteCSSBlockList();
+
+        $import = new Import(new URL(new CSSString('https://www.example.com/')), '');
+        $subject->setContents([$import]);
+
+        $result = $subject->getAllDeclarationBlocks();
+
+        self::assertSame([], $result);
+    }
+
+    /**
+     * @test
+     */
+    public function getAllDeclarationBlocksIgnoresCharset(): void
+    {
+        $subject = new ConcreteCSSBlockList();
+
+        $charset = new Charset(new CSSString('UTF-8'));
+        $subject->setContents([$charset]);
+
+        $result = $subject->getAllDeclarationBlocks();
+
+        self::assertSame([], $result);
+    }
 }
diff --git a/tests/Unit/CSSList/DocumentTest.php b/tests/Unit/CSSList/DocumentTest.php
index 07afcf1b..509b4b9d 100644
--- a/tests/Unit/CSSList/DocumentTest.php
+++ b/tests/Unit/CSSList/DocumentTest.php
@@ -61,94 +61,6 @@ public function isCSSList(): void
         self::assertInstanceOf(CSSList::class, $subject);
     }
 
-    /**
-     * @test
-     */
-    public function getAllDeclarationBlocksForNoContentsReturnsEmptyArray(): void
-    {
-        $subject = new Document();
-
-        self::assertSame([], $subject->getAllDeclarationBlocks());
-    }
-
-    /**
-     * @test
-     */
-    public function getAllDeclarationBlocksCanReturnOneDirectDeclarationBlockContent(): void
-    {
-        $subject = new Document();
-
-        $declarationBlock = new DeclarationBlock();
-        $subject->setContents([$declarationBlock]);
-
-        $result = $subject->getAllDeclarationBlocks();
-
-        self::assertSame([$declarationBlock], $result);
-    }
-
-    /**
-     * @test
-     */
-    public function getAllDeclarationBlocksCanReturnMultipleDirectDeclarationBlockContents(): void
-    {
-        $subject = new Document();
-
-        $declarationBlock1 = new DeclarationBlock();
-        $declarationBlock2 = new DeclarationBlock();
-        $subject->setContents([$declarationBlock1, $declarationBlock2]);
-
-        $result = $subject->getAllDeclarationBlocks();
-
-        self::assertSame([$declarationBlock1, $declarationBlock2], $result);
-    }
-
-    /**
-     * @test
-     */
-    public function getAllDeclarationBlocksReturnsDeclarationBlocksWithinAtRuleBlockList(): void
-    {
-        $subject = new Document();
-
-        $declarationBlock = new DeclarationBlock();
-        $atRuleBlockList = new AtRuleBlockList('media');
-        $atRuleBlockList->setContents([$declarationBlock]);
-        $subject->setContents([$atRuleBlockList]);
-
-        $result = $subject->getAllDeclarationBlocks();
-
-        self::assertSame([$declarationBlock], $result);
-    }
-
-    /**
-     * @test
-     */
-    public function getAllDeclarationBlocksIgnoresImport(): void
-    {
-        $subject = new Document();
-
-        $import = new Import(new URL(new CSSString('https://www.example.com/')), '');
-        $subject->setContents([$import]);
-
-        $result = $subject->getAllDeclarationBlocks();
-
-        self::assertSame([], $result);
-    }
-
-    /**
-     * @test
-     */
-    public function getAllDeclarationBlocksIgnoresCharset(): void
-    {
-        $subject = new Document();
-
-        $charset = new Charset(new CSSString('UTF-8'));
-        $subject->setContents([$charset]);
-
-        $result = $subject->getAllDeclarationBlocks();
-
-        self::assertSame([], $result);
-    }
-
     /**
      * @test
      */