diff --git a/src/Composer/Repository/ComposerRepository.php b/src/Composer/Repository/ComposerRepository.php
index f06fcf5c2..1dcf991aa 100644
--- a/src/Composer/Repository/ComposerRepository.php
+++ b/src/Composer/Repository/ComposerRepository.php
@@ -690,14 +690,15 @@ class ComposerRepository extends ArrayRepository implements ConfigurableReposito
         }
 
         if ($apiUrl !== null && count($packageConstraintMap) > 0) {
-            $options = [
-                'http' => [
-                    'method' => 'POST',
-                    'header' => ['Content-type: application/x-www-form-urlencoded'],
-                    'timeout' => 10,
-                    'content' => http_build_query(['packages' => array_keys($packageConstraintMap)]),
-                ],
-            ];
+            $options = $this->options;
+            $options['http']['method'] = 'POST';
+            if (isset($options['http']['header'])) {
+                $options['http']['header'] = (array) $options['http']['header'];
+            }
+            $options['http']['header'][] = 'Content-type: application/x-www-form-urlencoded';
+            $options['http']['timeout'] = 10;
+            $options['http']['content'] = http_build_query(['packages' => array_keys($packageConstraintMap)]);
+
             $response = $this->httpDownloader->get($apiUrl, $options);
             /** @var string $name */
             foreach ($response->decodeJson()['advisories'] as $name => $list) {
diff --git a/tests/Composer/Test/Mock/HttpDownloaderMock.php b/tests/Composer/Test/Mock/HttpDownloaderMock.php
index 538124a1d..0005a5d87 100644
--- a/tests/Composer/Test/Mock/HttpDownloaderMock.php
+++ b/tests/Composer/Test/Mock/HttpDownloaderMock.php
@@ -112,8 +112,10 @@ class HttpDownloaderMock extends HttpDownloader
         }
 
         throw new AssertionFailedError(
-            'Received unexpected request for "'.$fileUrl.'"'.PHP_EOL.
-            (is_array($this->expectations) && count($this->expectations) > 0 ? 'Expected "'.$this->expectations[0]['url'].'" at this point.' : 'Expected no more calls at this point.').PHP_EOL.
+            'Received unexpected request for "'.$fileUrl.'" with options "'.json_encode($options).'"'.PHP_EOL.
+            (is_array($this->expectations) && count($this->expectations) > 0
+                ? 'Expected "'.$this->expectations[0]['url'].($this->expectations[0]['options'] !== null ? '" with options "'.json_encode($this->expectations[0]['options']) : '').'" at this point.'
+                : 'Expected no more calls at this point.').PHP_EOL.
             'Received calls:'.PHP_EOL.implode(PHP_EOL, array_slice($this->log, 0, -1))
         );
     }
diff --git a/tests/Composer/Test/Repository/ComposerRepositoryTest.php b/tests/Composer/Test/Repository/ComposerRepositoryTest.php
index 19192ffda..0806bb108 100644
--- a/tests/Composer/Test/Repository/ComposerRepositoryTest.php
+++ b/tests/Composer/Test/Repository/ComposerRepositoryTest.php
@@ -16,6 +16,7 @@ use Composer\IO\NullIO;
 use Composer\Json\JsonFile;
 use Composer\Repository\ComposerRepository;
 use Composer\Repository\RepositoryInterface;
+use Composer\Semver\Constraint\Constraint;
 use Composer\Test\Mock\FactoryMock;
 use Composer\Test\TestCase;
 use Composer\Package\Loader\ArrayLoader;
@@ -380,4 +381,53 @@ class ComposerRepositoryTest extends TestCase
 
         $this->assertEquals(['foo/bar'], $repository->getPackageNames());
     }
+
+    public function testGetSecurityAdvisoriesAssertRepositoryHttpOptionsAreUsed(): void
+    {
+        $httpDownloader = $this->getHttpDownloaderMock();
+        $httpDownloader->expects(
+            [
+                [
+                    'url' => 'https://example.org/packages.json',
+                    'body' => JsonFile::encode([
+                        'packages' => ['foo/bar' => [
+                            'dev-branch' => ['name' => 'foo/bar'],
+                            'v1.0.0' => ['name' => 'foo/bar'],
+                        ]],
+                        'metadata-url' => 'https://example.org/p2/%package%.json',
+                        'security-advisories' => [
+                            'api-url' => 'https://example.org/security-advisories',
+                        ],
+                    ]),
+                    'options' => ['http' => ['verify_peer' => false]],
+                ],
+                [
+                    'url' => 'https://example.org/security-advisories',
+                    'body' => JsonFile::encode(['advisories' => []]),
+                    'options' => ['http' => [
+                        'verify_peer' => false,
+                        'method' => 'POST',
+                        'header' => [
+                            'Content-type: application/x-www-form-urlencoded',
+                        ],
+                        'timeout' => 10,
+                        'content' => http_build_query(['packages' => ['foo/bar']]),
+                    ]],
+                ]
+            ],
+            true
+        );
+
+        $repository = new ComposerRepository(
+            ['url' => 'https://example.org/packages.json', 'options' => ['http' => ['verify_peer' => false]]],
+            new NullIO(),
+            FactoryMock::createConfig(),
+            $httpDownloader
+        );
+
+        $this->assertSame([
+            'namesFound' => [],
+            'advisories' => [],
+        ], $repository->getSecurityAdvisories(['foo/bar' => new Constraint('=', '1.0.0.0')]));
+    }
 }