diff --git a/core/command/encryption/decryptall.php b/core/command/encryption/decryptall.php
index 374f635725..696570b7ae 100644
--- a/core/command/encryption/decryptall.php
+++ b/core/command/encryption/decryptall.php
@@ -77,13 +77,13 @@ class DecryptAll extends Command {
 		$this->questionHelper = $questionHelper;
 
 		$this->wasTrashbinEnabled = $this->appManager->isEnabledForUser('files_trashbin');
-		$this->wasSingleUserModeEnabled = $this->config->getSystemValue('singleUser', false);
-		$this->config->setSystemValue('singleUser', true);
+		$this->wasSingleUserModeEnabled = $this->config->getSystemValue('singleuser', false);
+		$this->config->setSystemValue('singleuser', true);
 		$this->appManager->disableApp('files_trashbin');
 	}
 
 	public function __destruct() {
-		$this->config->setSystemValue('singleUser', $this->wasSingleUserModeEnabled);
+		$this->config->setSystemValue('singleuser', $this->wasSingleUserModeEnabled);
 		if ($this->wasTrashbinEnabled) {
 			$this->appManager->enableApp('files_trashbin');
 		}
diff --git a/core/command/encryption/encryptall.php b/core/command/encryption/encryptall.php
index 7f33e18ecb..950ce5166d 100644
--- a/core/command/encryption/encryptall.php
+++ b/core/command/encryption/encryptall.php
@@ -68,13 +68,13 @@ class EncryptAll extends Command {
 		$this->config = $config;
 		$this->questionHelper = $questionHelper;
 		$this->wasTrashbinEnabled = $this->appManager->isEnabledForUser('files_trashbin');
-		$this->wasSingleUserModeEnabled = $this->config->getSystemValue('singleUser', false);
-		$this->config->setSystemValue('singleUser', true);
+		$this->wasSingleUserModeEnabled = $this->config->getSystemValue('singleuser', false);
+		$this->config->setSystemValue('singleuser', true);
 		$this->appManager->disableApp('files_trashbin');
 	}
 
 	public function __destruct() {
-		$this->config->setSystemValue('singleUser', $this->wasSingleUserModeEnabled);
+		$this->config->setSystemValue('singleuser', $this->wasSingleUserModeEnabled);
 		if ($this->wasTrashbinEnabled) {
 			$this->appManager->enableApp('files_trashbin');
 		}
diff --git a/tests/core/command/encryption/decryptalltest.php b/tests/core/command/encryption/decryptalltest.php
index b7fd630e9b..ef36d6d282 100644
--- a/tests/core/command/encryption/decryptalltest.php
+++ b/tests/core/command/encryption/decryptalltest.php
@@ -71,7 +71,7 @@ class DecryptAllTest extends TestCase {
 
 		$this->config->expects($this->any())
 			->method('getSystemValue')
-			->with('singleUser', false)
+			->with('singleuser', false)
 			->willReturn(false);
 		$this->appManager->expects($this->any())
 			->method('isEnabledForUser')
@@ -83,7 +83,7 @@ class DecryptAllTest extends TestCase {
 		// on construct we enable single-user-mode and disable the trash bin
 		$this->config->expects($this->at(1))
 			->method('setSystemValue')
-			->with('singleUser', true);
+			->with('singleuser', true);
 		$this->appManager->expects($this->once())
 			->method('disableApp')
 			->with('files_trashbin');
@@ -91,7 +91,7 @@ class DecryptAllTest extends TestCase {
 		// on destruct wi disable single-user-mode again and enable the trash bin
 		$this->config->expects($this->at(2))
 			->method('setSystemValue')
-			->with('singleUser', false);
+			->with('singleuser', false);
 		$this->appManager->expects($this->once())
 			->method('enableApp')
 			->with('files_trashbin');
diff --git a/tests/core/command/encryption/encryptalltest.php b/tests/core/command/encryption/encryptalltest.php
index 41edee6987..9f7f737504 100644
--- a/tests/core/command/encryption/encryptalltest.php
+++ b/tests/core/command/encryption/encryptalltest.php
@@ -81,9 +81,9 @@ class EncryptAllTest extends TestCase {
 		$this->appManager->expects($this->once())->method('disableApp')->with('files_trashbin');
 		// enable single user mode to avoid that other user login during encryption
 		// destructor should disable the single user mode again
-		$this->config->expects($this->once())->method('getSystemValue')->with('singleUser', false)->willReturn(false);
-		$this->config->expects($this->at(1))->method('setSystemValue')->with('singleUser', true);
-		$this->config->expects($this->at(2))->method('setSystemValue')->with('singleUser', false);
+		$this->config->expects($this->once())->method('getSystemValue')->with('singleuser', false)->willReturn(false);
+		$this->config->expects($this->at(1))->method('setSystemValue')->with('singleuser', true);
+		$this->config->expects($this->at(2))->method('setSystemValue')->with('singleuser', false);
 
 		new EncryptAll($this->encryptionManager, $this->appManager, $this->config, $this->questionHelper);
 	}