diff --git a/backend/dataAccess/src/test/scala/ru/tinkoff/tcb/bson/derivation/DerivedCodecsSuite.scala b/backend/dataAccess/src/test/scala/ru/tinkoff/tcb/bson/derivation/DerivedCodecsSuite.scala
index 56464f33..d371a295 100644
--- a/backend/dataAccess/src/test/scala/ru/tinkoff/tcb/bson/derivation/DerivedCodecsSuite.scala
+++ b/backend/dataAccess/src/test/scala/ru/tinkoff/tcb/bson/derivation/DerivedCodecsSuite.scala
@@ -1,6 +1,5 @@
 package ru.tinkoff.tcb.bson.derivation
 
-import derevo.derive
 import org.mongodb.scala.bson.BsonDocument
 import org.scalacheck.Arbitrary
 import org.scalacheck.Gen
@@ -10,17 +9,8 @@ import org.scalatest.matchers.should.Matchers
 import org.scalatestplus.scalacheck.Checkers
 
 import ru.tinkoff.tcb.bson.*
-import ru.tinkoff.tcb.bson.annotation.BsonDiscriminator
 
 class DerivedCodecsSuite extends AnyFunSuite with Checkers with Matchers with TryValues {
-
-  // Stolen from http://github.com/travisbrown/circe
-  @derive(bsonDecoder, bsonEncoder) @BsonDiscriminator("case", _.reverse)
-  sealed trait RecursiveAdtExample
-  final case class BaseAdtExample(a: String) extends RecursiveAdtExample
-  final case class NestedAdtExample(r: RecursiveAdtExample) extends RecursiveAdtExample
-  object RecursiveAdtExample
-
   private def atDepth(depth: Int): Gen[RecursiveAdtExample] =
     if (depth < 3)
       Gen.oneOf(
diff --git a/backend/dataAccess/src/test/scala/ru/tinkoff/tcb/bson/derivation/TestDomain.scala b/backend/dataAccess/src/test/scala/ru/tinkoff/tcb/bson/derivation/TestDomain.scala
index 142ed767..6d71712a 100644
--- a/backend/dataAccess/src/test/scala/ru/tinkoff/tcb/bson/derivation/TestDomain.scala
+++ b/backend/dataAccess/src/test/scala/ru/tinkoff/tcb/bson/derivation/TestDomain.scala
@@ -5,6 +5,7 @@ import java.time.Year
 
 import derevo.derive
 
+import ru.tinkoff.tcb.bson.annotation.BsonDiscriminator
 import ru.tinkoff.tcb.bson.annotation.BsonKey
 
 @derive(bsonDecoder, bsonEncoder)
@@ -35,3 +36,10 @@ final case class TestEntityWithDefaults(
     linkId: Option[Int],
     checks: Seq[TestCheck] = Seq()
 )
+
+// Stolen from http://github.com/travisbrown/circe
+@derive(bsonDecoder, bsonEncoder) @BsonDiscriminator("case", _.reverse)
+sealed trait RecursiveAdtExample
+final case class BaseAdtExample(a: String) extends RecursiveAdtExample
+final case class NestedAdtExample(r: RecursiveAdtExample) extends RecursiveAdtExample
+object RecursiveAdtExample
diff --git a/backend/dataAccess/src/test/scala/ru/tinkoff/tcb/generic/FieldsSpec.scala b/backend/dataAccess/src/test/scala/ru/tinkoff/tcb/generic/FieldsSpec.scala
index 063152b8..8ab64239 100644
--- a/backend/dataAccess/src/test/scala/ru/tinkoff/tcb/generic/FieldsSpec.scala
+++ b/backend/dataAccess/src/test/scala/ru/tinkoff/tcb/generic/FieldsSpec.scala
@@ -4,8 +4,6 @@ import org.scalatest.funsuite.AnyFunSuite
 import org.scalatest.matchers.should.Matchers
 
 class FieldsSpec extends AnyFunSuite with Matchers {
-  case class Evidence()
-
   test("Fields of empty case class") {
     Fields[Evidence].fields shouldBe Nil
   }
@@ -16,11 +14,13 @@ class FieldsSpec extends AnyFunSuite with Matchers {
     Fields[Projection].fields shouldBe List("ev", "label")
   }
 
-  sealed trait ST
-  final case class A(a: Int) extends ST
-  final case class B(b: Int) extends ST
-
   test("Fields of sealed trait") {
     Fields[ST].fields shouldBe Nil
   }
 }
+
+final case class Evidence()
+
+sealed trait ST
+final case class A(a: Int) extends ST
+final case class B(b: Int) extends ST
diff --git a/backend/mockingbird-api/src/main/scala/ru/tinkoff/tcb/mockingbird/TrustSomeHostsManager.scala b/backend/mockingbird-api/src/main/scala/ru/tinkoff/tcb/mockingbird/TrustSomeHostsManager.scala
index 171b9974..15261a45 100644
--- a/backend/mockingbird-api/src/main/scala/ru/tinkoff/tcb/mockingbird/TrustSomeHostsManager.scala
+++ b/backend/mockingbird-api/src/main/scala/ru/tinkoff/tcb/mockingbird/TrustSomeHostsManager.scala
@@ -7,6 +7,7 @@ import java.security.cert.X509Certificate
 import javax.net.ssl.SSLEngine
 import javax.net.ssl.TrustManagerFactory
 import javax.net.ssl.X509ExtendedTrustManager
+import scala.annotation.nowarn
 
 /*
   Rewritten from https://github.com/line/armeria/blob/main/core/src/main/java/com/linecorp/armeria/client/IgnoreHostsTrustManager.java
@@ -47,8 +48,9 @@ class TrustSomeHostsManager(delegate: X509ExtendedTrustManager, insecureHosts: S
 }
 
 object TrustSomeHostsManager {
+  @nowarn("cat=lint-nonlocal-return")
   def of(insecureHosts: Set[String]): TrustSomeHostsManager = {
-    var trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm)
+    val trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm)
     trustManagerFactory.init(null.asInstanceOf[KeyStore])
     val trustManagers = trustManagerFactory.getTrustManagers
     for (tm <- trustManagers)