diff --git a/.gitignore b/.gitignore
index a9ad9c4..1cf4b44 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 .idea
+.phpunit.result.cache
 composer.phar
 vendor/
 build/
diff --git a/Makefile b/Makefile
index c5a03a2..e8b6a5b 100644
--- a/Makefile
+++ b/Makefile
@@ -5,6 +5,6 @@ build: ; docker compose build
 install: ; docker compose run --rm web composer install
 update: ; docker compose run --rm web composer update
 
-test: ; docker compose run --rm web ./vendor/bin/phpunit --do-not-cache-result -c phpunit.xml
+test: ; docker compose run --rm web composer test
 test-only: ; docker compose run --rm web ./vendor/bin/phpunit --do-not-cache-result --group only -c phpunit.xml
 
diff --git a/test/Escher/Test/EndToEnd/CentralTest.php b/test/Escher/Test/EndToEnd/CentralTest.php
index cddd30f..6ac42cb 100644
--- a/test/Escher/Test/EndToEnd/CentralTest.php
+++ b/test/Escher/Test/EndToEnd/CentralTest.php
@@ -64,11 +64,12 @@ public function signRequestTests(JsonTestCase $testCase)
         $request = $testCase->getRequest();
 
         try {
+            $host = $request['headers']['Host'] ?? $request['headers']['host'];
             $signedHeaders = $escher->signRequest(
                 $testCase->getApiKey(),
                 $testCase->getApiSecret(),
                 $request['method'],
-                'https://' . $request['headers']['Host'] . $request['url'],
+                'https://' . $host . $request['url'],
                 $request['body'],
                 $request['headers'],
                 $testCase->getHeadersToSign(),
diff --git a/test/Escher/Test/Helper/JsonTestCase.php b/test/Escher/Test/Helper/JsonTestCase.php
index fb07553..0103ab8 100644
--- a/test/Escher/Test/Helper/JsonTestCase.php
+++ b/test/Escher/Test/Helper/JsonTestCase.php
@@ -135,7 +135,7 @@ public function getExpectedError(): string
 
     public function getMandatorySignedHeaders()
     {
-        return $this->data['mandatorySignedHeaders'] ?: [];
+        return $this->data['mandatorySignedHeaders'] ?? [];
     }
 
     public function getAlgoPrefix(): string
@@ -155,12 +155,12 @@ public function getHashAlgo(): string
 
     public function getAuthHeaderName(): ?string
     {
-        return $this->data['config']['authHeaderName'];
+        return $this->data['config']['authHeaderName'] ?? null;
     }
 
     public function getDateHeaderName(): ?string
     {
-        return $this->data['config']['dateHeaderName'];
+        return $this->data['config']['dateHeaderName'] ?? null;
     }
 
     public function getApiKey(): string
@@ -170,7 +170,7 @@ public function getApiKey(): string
 
     public function getApiSecret(): ?string
     {
-        return $this->data['config']['apiSecret'];
+        return $this->data['config']['apiSecret'] ?? null;
     }
 
     public function getKeyDb(): array