diff --git a/lib/private/Group/Group.php b/lib/private/Group/Group.php
index 6cdfd190da7a..d7f563d36680 100644
--- a/lib/private/Group/Group.php
+++ b/lib/private/Group/Group.php
@@ -87,10 +87,16 @@ public function __construct($gid, $backends, $userManager, EventDispatcherInterf
 		$this->displayName = $displayName;
 	}
 
+	/**
+	 * @return string
+	 */
 	public function getGID() {
 		return $this->gid;
 	}
 
+	/**
+	 * @return string|null
+	 */
 	public function getDisplayName() {
 		if ($this->displayName === null) {
 			return $this->gid;
diff --git a/tests/acceptance/features/bootstrap/ChecksumContext.php b/tests/acceptance/features/bootstrap/ChecksumContext.php
index 17f8496b0706..4e15c8a8e5d8 100644
--- a/tests/acceptance/features/bootstrap/ChecksumContext.php
+++ b/tests/acceptance/features/bootstrap/ChecksumContext.php
@@ -370,7 +370,7 @@ public function theOcChecksumHeaderShouldNotBeThere():void {
 		Assert::assertFalse(
 			$isHeader,
 			"Expected no checksum header but got "
-			. $this->featureContext->getResponse()->getHeader('OC-Checksum')
+			. $this->featureContext->getResponse()->getHeaderLine('OC-Checksum')
 		);
 	}
 
diff --git a/tests/acceptance/features/bootstrap/Sharing.php b/tests/acceptance/features/bootstrap/Sharing.php
index f1bd50755761..e4245f6cd50f 100644
--- a/tests/acceptance/features/bootstrap/Sharing.php
+++ b/tests/acceptance/features/bootstrap/Sharing.php
@@ -2438,10 +2438,10 @@ public function theFieldsOfTheResponseForUserForResourceShouldInclude(
 
 		$this->getShareData($user, $share_id);
 		foreach ($bodyRows as $field => $value) {
-			if ($type === "user" && \in_array($field, ["share_with"])) {
+			if ($type === "user" && $field == "share_with") {
 				$value = $this->getActualUsername($value);
 			}
-			if (\in_array($field, ["uid_owner"])) {
+			if ($field == "uid_owner") {
 				$value = $this->getActualUsername($value);
 			}
 			$value = $this->replaceValuesFromTable($field, $value);
diff --git a/tests/acceptance/features/bootstrap/WebUILoginContext.php b/tests/acceptance/features/bootstrap/WebUILoginContext.php
index 6790659b0633..008ab390f2db 100644
--- a/tests/acceptance/features/bootstrap/WebUILoginContext.php
+++ b/tests/acceptance/features/bootstrap/WebUILoginContext.php
@@ -733,7 +733,7 @@ public function theUserFollowsThePasswordResetLinkFromTheirEmailUsingInvalidToke
 		$goodToken = \array_pop($linkParts);
 		// reverse the token string, an easy way to make the token invalid
 		$invalidToken = \strrev($goodToken);
-		\array_push($linkParts, $invalidToken);
+		$linkParts[] = $invalidToken;
 		$linkParts[] = $username;
 		$adjustedLink = \implode('/', $linkParts);
 		$this->visitPath($adjustedLink);