diff --git a/src/main/scala/uk/org/floop/sparqlTestRunner/SparqlTestRunner.scala b/src/main/scala/uk/org/floop/sparqlTestRunner/SparqlTestRunner.scala
index 731f6c8..e9d8b6f 100644
--- a/src/main/scala/uk/org/floop/sparqlTestRunner/SparqlTestRunner.scala
+++ b/src/main/scala/uk/org/floop/sparqlTestRunner/SparqlTestRunner.scala
@@ -200,7 +200,7 @@
     }
   }
 
-  def main(args: Array[String]) {
+  def main(args: Array[String]): Unit = {
     val (queryExecution, config, testDirs) = parseArgs(args)
     val timeSuiteStart = System.currentTimeMillis()
     val (errors, failures, tests, results) = testDirs.foldLeft[(Int, Int, Int, NodeSeq)](0, 0, 0, Nil) { (a, d) =>
diff --git a/src/main/scala/uk/org/floop/updateInPlace/Run.scala b/src/main/scala/uk/org/floop/updateInPlace/Run.scala
index b528e45..f602084 100644
--- a/src/main/scala/uk/org/floop/updateInPlace/Run.scala
+++ b/src/main/scala/uk/org/floop/updateInPlace/Run.scala
@@ -24,6 +24,7 @@
 import java.nio.file.Files
 import scala.io.Source
 import scala.util.Using
+import scopt.OptionParser
 
 case class Config(dir: File = new File("sparql"),
                   data: File = null)
@@ -31,7 +32,7 @@
 object Run extends App {
 
   val packageVersion: String = getClass.getPackage.getImplementationVersion
-  val parser = new scopt.OptionParser[Config]("sparql-update-in-place") {
+  val parser: OptionParser[Config] = new scopt.OptionParser[Config]("sparql-update-in-place") {
     head("sparql-update-in-place", packageVersion)
     opt[File]('q', "querydir")
       .optional()
diff --git a/src/test/scala/uk/org/floop/ProtocolTests.scala b/src/test/scala/uk/org/floop/ProtocolTests.scala
index 7449d0d..049064d 100644
--- a/src/test/scala/uk/org/floop/ProtocolTests.scala
+++ b/src/test/scala/uk/org/floop/ProtocolTests.scala
@@ -13,11 +13,11 @@
 class ProtocolTests extends AnyFlatSpec with BeforeAndAfterEach {
   private val wireMockServer = new WireMockServer(wireMockConfig().dynamicPort())
 
-  override def beforeEach {
+  override def beforeEach: Unit = {
     wireMockServer.start()
   }
 
-  override def afterEach {
+  override def afterEach: Unit = {
     wireMockServer.stop()
   }