diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a482e472c..4edbc7ed8 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -15,7 +15,7 @@ jobs:
       - name: Check formatting
         run: sbt scalafmtCheckAll
       - name: Run unit tests
-        run: sbt test
+        run: sbt +test
       - name: Run integration tests Kinesis
         run: sbt "project kinesisDistroless" IntegrationTest/test
       - name: Run integration tests PubSub
diff --git a/core/src/main/scala/com.snowplowanalytics.snowplow.collector.core/HttpServer.scala b/core/src/main/scala/com.snowplowanalytics.snowplow.collector.core/HttpServer.scala
index e150119db..4a2e46db7 100644
--- a/core/src/main/scala/com.snowplowanalytics.snowplow.collector.core/HttpServer.scala
+++ b/core/src/main/scala/com.snowplowanalytics.snowplow.collector.core/HttpServer.scala
@@ -58,7 +58,7 @@ object HttpServer {
 
   private def createStatsdConfig(metricsConfig: Config.Metrics): StatsDMetricFactoryConfig = {
     val server = InetSocketAddress.createUnresolved(metricsConfig.statsd.hostname, metricsConfig.statsd.port)
-    val tags   = metricsConfig.statsd.tags.toSeq.map { case (name, value) => Tag.of(name, value) }
+    val tags   = metricsConfig.statsd.tags.toVector.map { case (name, value) => Tag.of(name, value) }
     StatsDMetricFactoryConfig(Some(metricsConfig.statsd.prefix), server, defaultTags = tags)
   }
 
diff --git a/core/src/main/scala/com.snowplowanalytics.snowplow.collector.core/Service.scala b/core/src/main/scala/com.snowplowanalytics.snowplow.collector.core/Service.scala
index e85b493b2..317bc3020 100644
--- a/core/src/main/scala/com.snowplowanalytics.snowplow.collector.core/Service.scala
+++ b/core/src/main/scala/com.snowplowanalytics.snowplow.collector.core/Service.scala
@@ -193,8 +193,7 @@ class Service[F[_]: Sync](
     config.doNotTrackCookie.enabled && req
       .cookies
       .find(_.name == config.doNotTrackCookie.name)
-      .map(cookie => config.doNotTrackCookie.value.r.matches(cookie.content))
-      .getOrElse(false)
+      .exists(cookie => config.doNotTrackCookie.value.r.pattern.matcher(cookie.content).matches())
 
   def extractHostname(req: Request[F]): Option[String] =
     req.uri.authority.map(_.host.renderString) // Hostname is extracted like this in Akka-Http as well
diff --git a/project/BuildSettings.scala b/project/BuildSettings.scala
index 8bd46e191..bcefd4492 100644
--- a/project/BuildSettings.scala
+++ b/project/BuildSettings.scala
@@ -27,6 +27,7 @@ object BuildSettings {
     name           := "snowplow-stream-collector",
     description    := "Scala Stream Collector for Snowplow raw events",
     scalaVersion   := "2.13.12",
+    crossScalaVersions := Seq("2.13.12", "2.12.14"),
     scalacOptions ++= Seq("-Ywarn-macros:after"),
     javacOptions   := Seq("-source", "11", "-target", "11"),
     resolvers     ++= Seq(