diff --git a/tests/Unit/Composer/Extra/StraussConfigTest.php b/tests/Unit/Composer/Extra/StraussConfigTest.php
index ca07575f..2b850c14 100644
--- a/tests/Unit/Composer/Extra/StraussConfigTest.php
+++ b/tests/Unit/Composer/Extra/StraussConfigTest.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * Should accept Nannarl config and Mozart config.
+ * Should accept Strauss config and Mozart config.
  *
  * Should have sensible defaults.
  */
@@ -11,6 +11,9 @@
 use Composer\IO\NullIO;
 use PHPUnit\Framework\TestCase;
 
+/**
+ * @covers \BrianHenryIE\Strauss\Composer\Extra\StraussConfig
+ */
 class StraussConfigTest extends TestCase
 {
 
@@ -629,4 +632,54 @@ public function testNamespacePrefixHasNoSlash()
 
         $this->assertEquals("My_Mozart_Config", $sut->getNamespacePrefix());
     }
+
+    public function testIncludeModifiedDateDefaultTrue()
+    {
+
+        $composerExtraStraussJson = <<<'EOD'
+{
+ "extra":{
+  "strauss": {
+   "namespace_prefix": "BrianHenryIE\\Strauss\\"
+  }
+ }
+}
+EOD;
+        $tmpfname = tempnam(sys_get_temp_dir(), 'strauss-test-');
+        file_put_contents($tmpfname, $composerExtraStraussJson);
+
+        $composer = Factory::create(new NullIO(), $tmpfname);
+
+        $sut = new StraussConfig($composer);
+
+        $this->assertTrue($sut->isIncludeModifiedDate());
+    }
+
+    /**
+     * "when I add "include_modified_date": false to the extra/strauss object it doesn't take any effect, the date is still added to the header."
+     *
+     * @see https://github.com/BrianHenryIE/strauss/issues/35
+     */
+    public function testIncludeModifiedDate()
+    {
+
+        $composerExtraStraussJson = <<<'EOD'
+{
+ "extra":{
+  "strauss": {
+   "namespace_prefix": "BrianHenryIE\\Strauss\\",
+   "include_modified_date": false
+  }
+ }
+}
+EOD;
+        $tmpfname = tempnam(sys_get_temp_dir(), 'strauss-test-');
+        file_put_contents($tmpfname, $composerExtraStraussJson);
+
+        $composer = Factory::create(new NullIO(), $tmpfname);
+
+        $sut = new StraussConfig($composer);
+
+        $this->assertFalse($sut->isIncludeModifiedDate());
+    }
 }
diff --git a/tests/Unit/LicenserTest.php b/tests/Unit/LicenserTest.php
index 98051c5d..be53efa8 100644
--- a/tests/Unit/LicenserTest.php
+++ b/tests/Unit/LicenserTest.php
@@ -71,9 +71,6 @@ public function testFindLicenceFilesPathsAreRelative()
      * @see https://www.phpliveregex.com/p/A5y
      */
 
-    // https://schibsted.com/blog/mocking-the-file-system-using-phpunit-and-vfsstream/
-
-
     /**
      * @see https://github.com/AuthorizeNet/sdk-php/blob/a3e76f96f674d16e892f87c58bedb99dada4b067/lib/net/authorize/api/contract/v1/ANetApiRequestType.php
      *
@@ -106,6 +103,49 @@ public function testAppendHeaderCommentInformationNoHeader()
  * @see https://github.com/BrianHenryIE/strauss
  */
 
+namespace net\authorize\api\contract\v1;
+EOD;
+
+        $actual = $sut->addChangeDeclarationToPhpString($given, '25-April-2021', 'proprietary');
+
+        $this->assertEquals($expected, $actual);
+    }
+
+
+    // https://schibsted.com/blog/mocking-the-file-system-using-phpunit-and-vfsstream/
+
+    /**
+     * Not including the date was reported as not working.
+     *
+     * @see https://github.com/BrianHenryIE/strauss/issues/35
+     *
+     * @covers ::addChangeDeclarationToPhpString
+     */
+    public function testAppendHeaderCommentNoDate()
+    {
+
+        $author = 'BrianHenryIE';
+
+        $config = $this->createMock(StraussConfig::class);
+        $config->expects($this->once())->method('isIncludeModifiedDate')->willReturn(false);
+
+        $sut = new Licenser($config, __DIR__, array(), $author);
+
+        $given = <<<'EOD'
+<?php
+
+namespace net\authorize\api\contract\v1;
+EOD;
+
+        $expected = <<<'EOD'
+<?php
+/**
+ * @license proprietary
+ *
+ * Modified by BrianHenryIE using Strauss.
+ * @see https://github.com/BrianHenryIE/strauss
+ */
+
 namespace net\authorize\api\contract\v1;
 EOD;