diff --git a/extensions-core/src/test/java/org/thingsboard/server/extensions/core/filter/DeviceAttributesFilterTest.java b/extensions-core/src/test/java/org/thingsboard/server/extensions/core/filter/DeviceAttributesFilterTest.java
index 13199788ad..ab06ff0048 100644
--- a/extensions-core/src/test/java/org/thingsboard/server/extensions/core/filter/DeviceAttributesFilterTest.java
+++ b/extensions-core/src/test/java/org/thingsboard/server/extensions/core/filter/DeviceAttributesFilterTest.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 package org.thingsboard.server.extensions.core.filter;
-С
+
 import org.thingsboard.server.common.data.id.DeviceId;
 import org.thingsboard.server.common.data.kv.AttributeKvEntry;
 import org.thingsboard.server.common.data.kv.BaseAttributeKvEntry;