diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..004382e
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,24 @@
+name: Tests on PRs
+
+on:
+  pull_request:
+    branches: [ master, develop ]
+
+jobs:
+
+  build-project:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@master
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v1
+        with:
+          java-version: 17
+
+      - name: Run scalafmt
+        run:  sbt scalafmtCheckAll
+
+      - name: Run tests
+        run: sbt test
\ No newline at end of file
diff --git a/build.sbt b/build.sbt
index 0f6cf13..62cbec6 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,13 @@ name := "zio-flyway-db-migrator"
 
 version := "0.1"
 
-scalaVersion := "3.2.0"
+scalaVersion := "3.3.0-RC2"
+
+scalacOptions ++= Seq(
+  "-Wunused:imports",
+  "-Wunused:privates",
+  "-Wunused:locals"
+)
 
 // for zio-interop
 resolvers +=
diff --git a/project/plugins.sbt b/project/plugins.sbt
index fc75663..939d3a9 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -1,3 +1,7 @@
-addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat" % "0.4.1")
+// code rules and format
+addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat" % "0.4.2")
 addSbtPlugin("org.scalameta"             % "sbt-scalafmt" % "2.4.6")
-addSbtPlugin("io.spray"                  % "sbt-revolver" % "0.9.1")
+addSbtPlugin("ch.epfl.scala"             % "sbt-scalafix" % "0.10.4")
+
+// code running
+addSbtPlugin("io.spray" % "sbt-revolver" % "0.9.1")
diff --git a/src/main/scala/com/github/denisnovac/ziolearn/Main.scala b/src/main/scala/com/github/denisnovac/ziolearn/Main.scala
index 06b4fba..1c7a613 100644
--- a/src/main/scala/com/github/denisnovac/ziolearn/Main.scala
+++ b/src/main/scala/com/github/denisnovac/ziolearn/Main.scala
@@ -9,12 +9,11 @@ import zio.config.ReadError
 import com.github.denisnovac.ziolearn.logging.LoggerLayer
 import com.github.denisnovac.ziolearn.config.AppConfig
 import com.github.denisnovac.ziolearn.jdbc.DBLayer
-
-import java.io.File
-import doobie.util.transactor.Transactor
 import com.github.denisnovac.ziolearn.cats.ZioCatsLayer
 import com.github.denisnovac.ziolearn.config.DBConfig
 
+import java.io.File
+
 object Main extends zio.interop.catz.CatsApp {
 
   private val configsLayer: ZLayer[Any, ReadError[String], DBConfig] =
diff --git a/src/main/scala/com/github/denisnovac/ziolearn/jdbc/DBLayer.scala b/src/main/scala/com/github/denisnovac/ziolearn/jdbc/DBLayer.scala
index 0727ec6..9f69549 100644
--- a/src/main/scala/com/github/denisnovac/ziolearn/jdbc/DBLayer.scala
+++ b/src/main/scala/com/github/denisnovac/ziolearn/jdbc/DBLayer.scala
@@ -1,7 +1,6 @@
 package com.github.denisnovac.ziolearn.jdbc
 
 import zio.*
-import zio.logging.*
 import doobie.util.transactor.Transactor
 import com.github.denisnovac.ziolearn.config.DBConfig
 import com.github.denisnovac.ziolearn.cats.ZioCatsLayer.ZioCats
diff --git a/src/main/scala/com/github/denisnovac/ziolearn/jdbc/DBMigrator.scala b/src/main/scala/com/github/denisnovac/ziolearn/jdbc/DBMigrator.scala
index f84ae50..b4a6afb 100644
--- a/src/main/scala/com/github/denisnovac/ziolearn/jdbc/DBMigrator.scala
+++ b/src/main/scala/com/github/denisnovac/ziolearn/jdbc/DBMigrator.scala
@@ -1,12 +1,9 @@
 package com.github.denisnovac.ziolearn.jdbc
 
 import zio.*
-import zio.logging.*
 import org.flywaydb.core.Flyway
 import org.flywaydb.core.api.configuration.FluentConfiguration
 import scala.jdk.CollectionConverters.*
-import scala.annotation.migration
-import org.flywaydb.core.api.Location
 import org.flywaydb.core.api.MigrationState
 import com.github.denisnovac.ziolearn.config.DBConfig
 
diff --git a/src/main/scala/com/github/denisnovac/ziolearn/jdbc/DBTransactor.scala b/src/main/scala/com/github/denisnovac/ziolearn/jdbc/DBTransactor.scala
index fd2000b..681647f 100644
--- a/src/main/scala/com/github/denisnovac/ziolearn/jdbc/DBTransactor.scala
+++ b/src/main/scala/com/github/denisnovac/ziolearn/jdbc/DBTransactor.scala
@@ -5,11 +5,7 @@ import zio.interop.catz.*
 import com.github.denisnovac.ziolearn.config.DBConfig
 import com.github.denisnovac.ziolearn.cats.ZioCatsLayer.ZioCats
 import doobie.hikari.HikariTransactor
-import cats.effect.kernel.Sync
 import doobie.*
-import doobie.implicits.*
-import doobie.hikari.*
-import cats.implicits.*
 import cats.effect.kernel.Async
 import cats.effect.std.Dispatcher
 import cats.effect.kernel.Resource
diff --git a/src/main/scala/com/github/denisnovac/ziolearn/logging/LoggerLayer.scala b/src/main/scala/com/github/denisnovac/ziolearn/logging/LoggerLayer.scala
index 50e9844..f5fed74 100644
--- a/src/main/scala/com/github/denisnovac/ziolearn/logging/LoggerLayer.scala
+++ b/src/main/scala/com/github/denisnovac/ziolearn/logging/LoggerLayer.scala
@@ -4,10 +4,8 @@ import zio.*
 import zio.logging.LogFormat.*
 import zio.logging.backend.SLF4J
 import doobie.util.log.LogHandler
-import doobie.util.log.LogEvent
 
 object LoggerLayer {
-  private val format = timestamp.fixed(32) |-| level |-| label("message", quoted(line))
 
   /** Copypasterd from doobie's default LogHandler.jdkLogHandler
     */
diff --git a/src/main/scala/com/github/denisnovac/ziolearn/services/UserStatusService.scala b/src/main/scala/com/github/denisnovac/ziolearn/services/UserStatusService.scala
index a34a176..4338557 100644
--- a/src/main/scala/com/github/denisnovac/ziolearn/services/UserStatusService.scala
+++ b/src/main/scala/com/github/denisnovac/ziolearn/services/UserStatusService.scala
@@ -6,7 +6,6 @@ import doobie.ConnectionIO
 import doobie.implicits.*
 import doobie.util.transactor.Transactor
 import cats.effect.Sync
-import cats.implicits.*
 import zio.*
 import UserStatusService.*
 import UserStatusService.UserStatusServiceErrors.*
diff --git a/src/test/scala/com/github/denisnovac/ziolearn/jdbc/SharedPostgresContainer.scala b/src/test/scala/com/github/denisnovac/ziolearn/jdbc/SharedPostgresContainer.scala
index ce1644e..868b688 100644
--- a/src/test/scala/com/github/denisnovac/ziolearn/jdbc/SharedPostgresContainer.scala
+++ b/src/test/scala/com/github/denisnovac/ziolearn/jdbc/SharedPostgresContainer.scala
@@ -1,7 +1,6 @@
 package com.github.denisnovac.ziolearn.jdbc
 
 import zio.*
-import zio.interop.catz.*
 import com.github.denisnovac.ziolearn.config.DBConfig
 import org.testcontainers.containers.PostgreSQLContainer
 import doobie.util.transactor.Transactor
diff --git a/src/test/scala/com/github/denisnovac/ziolearn/model/repos/StatusRepoSuit.scala b/src/test/scala/com/github/denisnovac/ziolearn/model/repos/StatusRepoSuit.scala
index ecf1c5e..e9c12bf 100644
--- a/src/test/scala/com/github/denisnovac/ziolearn/model/repos/StatusRepoSuit.scala
+++ b/src/test/scala/com/github/denisnovac/ziolearn/model/repos/StatusRepoSuit.scala
@@ -8,22 +8,23 @@ import zio.Task
 import zio.*
 import zio.test.*
 import com.github.denisnovac.ziolearn.model.*
-import java.time.Instant
 import doobie.implicits.*
 import cats.effect.kernel.Async
 import doobie.util.log.LogHandler
 import doobie.ConnectionIO
 
-object StatusRepoSuit extends SharedPostgresContainer {
+import com.github.denisnovac.ziolearn.util.TimeUtils
+
+object StatusRepoSuit extends SharedPostgresContainer with TimeUtils {
 
   override def spec: Spec[Transactor[Task] & Async[Task] & LogHandler & (TestEnvironment & Scope), Any] =
     test("CRUD for StatusRepo") {
 
-      val expectedStatus = Status(100, "StatusRepoSuitTest", Instant.now())
-      val modifiedStatus = Status(100, "StatusRepoSuitTest2", Instant.now())
+      val expectedStatus = Status(100, "StatusRepoSuitTest", timeNow())
+      val modifiedStatus = Status(100, "StatusRepoSuitTest2", timeNow())
 
       def crud(repo: StatusRepo[ConnectionIO], urepo: UserRepo[ConnectionIO]) = for {
-        _ <- urepo.upsert(User(100, "test", "test", Instant.now(), Instant.now()))
+        _ <- urepo.upsert(User(100, "test", "test", timeNow(), timeNow()))
 
         e  <- repo.upsert(expectedStatus)
         er <- repo.read(100)
diff --git a/src/test/scala/com/github/denisnovac/ziolearn/model/repos/UserRepoSuit.scala b/src/test/scala/com/github/denisnovac/ziolearn/model/repos/UserRepoSuit.scala
index 028fa50..527cbe7 100644
--- a/src/test/scala/com/github/denisnovac/ziolearn/model/repos/UserRepoSuit.scala
+++ b/src/test/scala/com/github/denisnovac/ziolearn/model/repos/UserRepoSuit.scala
@@ -9,16 +9,17 @@ import zio.Task
 import zio.*
 import zio.test.*
 import com.github.denisnovac.ziolearn.model.*
-import java.time.Instant
 import doobie.implicits.*
 import cats.effect.kernel.Async
 import doobie.util.log.LogHandler
 
-object UserRepoSuit extends SharedPostgresContainer {
+import com.github.denisnovac.ziolearn.util.TimeUtils
+
+object UserRepoSuit extends SharedPostgresContainer with TimeUtils {
   override def spec: Spec[Transactor[Task] & Async[Task] & LogHandler & (TestEnvironment & Scope), Any] =
     test("CRUD for UserRepo") {
 
-      val expectedUser     = User(1, "UserRepoSuitTest", "test", Instant.now(), Instant.now())
+      val expectedUser     = User(1, "UserRepoSuitTest", "test", timeNow(), timeNow())
       val modifiedExpected = expectedUser.copy(uValue = "test2")
 
       def crud(repo: UserRepo[ConnectionIO]) = for {
diff --git a/src/test/scala/com/github/denisnovac/ziolearn/util/TimeUtils.scala b/src/test/scala/com/github/denisnovac/ziolearn/util/TimeUtils.scala
new file mode 100644
index 0000000..6120eab
--- /dev/null
+++ b/src/test/scala/com/github/denisnovac/ziolearn/util/TimeUtils.scala
@@ -0,0 +1,11 @@
+package com.github.denisnovac.ziolearn.util
+
+import java.time.Instant
+
+trait TimeUtils {
+
+  def timeNow() = {
+    val i = Instant.now()
+    i.minusNanos(i.getNano())
+  }
+}