diff --git a/scalac-scoverage-plugin/src/main/scala/scoverage/IOUtils.scala b/scalac-scoverage-plugin/src/main/scala/scoverage/IOUtils.scala
index 2cfa3e1f..91a1caa3 100644
--- a/scalac-scoverage-plugin/src/main/scala/scoverage/IOUtils.scala
+++ b/scalac-scoverage-plugin/src/main/scala/scoverage/IOUtils.scala
@@ -80,6 +80,9 @@ object IOUtils {
           acc += (line.split(" ").toList match {
             case List(idx, clazz) => (idx.toInt, clazz)
             case List(idx) => (idx.toInt, "")
+            // This should never really happen but to avoid a match error we'll default to a 0
+            // index here since we start with 1 anyways.
+            case _ => (0, "")
           })
         }
       }
diff --git a/scalac-scoverage-plugin/src/main/scala/scoverage/Serializer.scala b/scalac-scoverage-plugin/src/main/scala/scoverage/Serializer.scala
index 39e7da80..d9e4ebfb 100644
--- a/scalac-scoverage-plugin/src/main/scala/scoverage/Serializer.scala
+++ b/scalac-scoverage-plugin/src/main/scala/scoverage/Serializer.scala
@@ -75,32 +75,32 @@ object Serializer {
   def coverageFile(dataDir: String): File = new File(dataDir, Constants.CoverageFileName)
 
   def deserialize(file: File): Coverage = {
-    deserialize(Source.fromFile(file)(Codec.UTF8).getLines)
+    deserialize(Source.fromFile(file)(Codec.UTF8).getLines())
   }
 
   def deserialize(lines: Iterator[String]): Coverage = {
     def toStatement(lines: Iterator[String]): Statement = {
-      val id: Int = lines.next.toInt
-      val sourcePath = lines.next
-      val packageName = lines.next
-      val className = lines.next
-      val classType = lines.next
-      val fullClassName = lines.next
-      val method = lines.next
+      val id: Int = lines.next().toInt
+      val sourcePath = lines.next()
+      val packageName = lines.next()
+      val className = lines.next()
+      val classType = lines.next()
+      val fullClassName = lines.next()
+      val method = lines.next()
       val loc = Location(packageName, className, fullClassName, ClassType.fromString(classType), method, sourcePath)
-      val start: Int = lines.next.toInt
-      val end: Int = lines.next.toInt
-      val lineNo: Int = lines.next.toInt
-      val symbolName: String = lines.next
-      val treeName: String = lines.next
-      val branch: Boolean = lines.next.toBoolean
-      val count: Int = lines.next.toInt
-      val ignored: Boolean = lines.next.toBoolean
+      val start: Int = lines.next().toInt
+      val end: Int = lines.next().toInt
+      val lineNo: Int = lines.next().toInt
+      val symbolName: String = lines.next()
+      val treeName: String = lines.next()
+      val branch: Boolean = lines.next().toBoolean
+      val count: Int = lines.next().toInt
+      val ignored: Boolean = lines.next().toBoolean
       val desc = lines.toList.mkString("\n")
       Statement(loc, id, start, end, lineNo, desc, symbolName, treeName, branch, count, ignored)
     }
 
-    val headerFirstLine = lines.next
+    val headerFirstLine = lines.next()
     require(headerFirstLine == "# Coverage data, format version: 2.0", "Wrong file format")
 
     val linesWithoutHeader = lines.dropWhile(_.startsWith("#"))
diff --git a/scalac-scoverage-plugin/src/main/scala/scoverage/report/CoberturaXmlWriter.scala b/scalac-scoverage-plugin/src/main/scala/scoverage/report/CoberturaXmlWriter.scala
index d7f4e7ee..27a5df63 100644
--- a/scalac-scoverage-plugin/src/main/scala/scoverage/report/CoberturaXmlWriter.scala
+++ b/scalac-scoverage-plugin/src/main/scala/scoverage/report/CoberturaXmlWriter.scala
@@ -10,7 +10,7 @@ import scala.xml.{Node, PrettyPrinter}
 /** @author Stephen Samuel */
 class CoberturaXmlWriter(sourceDirectories: Seq[File], outputDir: File) extends BaseReportWriter(sourceDirectories, outputDir) {
 
-  def this (baseDir: File, outputDir: File) {
+  def this (baseDir: File, outputDir: File) = {
     this(Seq(baseDir), outputDir)
   }
 
diff --git a/scalac-scoverage-plugin/src/main/scala/scoverage/report/CodeGrid.scala b/scalac-scoverage-plugin/src/main/scala/scoverage/report/CodeGrid.scala
index aa321420..72966a69 100644
--- a/scalac-scoverage-plugin/src/main/scala/scoverage/report/CodeGrid.scala
+++ b/scalac-scoverage-plugin/src/main/scala/scoverage/report/CodeGrid.scala
@@ -8,7 +8,7 @@ import scala.io.Source
 class CodeGrid(mFile: MeasuredFile, sourceEncoding: Option[String]) {
 
   // for backward compatibility only
-  def this (mFile: MeasuredFile) {
+  def this (mFile: MeasuredFile) = {
     this(mFile, None);
   }
 
diff --git a/scalac-scoverage-plugin/src/main/scala/scoverage/report/ScoverageHtmlWriter.scala b/scalac-scoverage-plugin/src/main/scala/scoverage/report/ScoverageHtmlWriter.scala
index c0b323af..d41064a0 100644
--- a/scalac-scoverage-plugin/src/main/scala/scoverage/report/ScoverageHtmlWriter.scala
+++ b/scalac-scoverage-plugin/src/main/scala/scoverage/report/ScoverageHtmlWriter.scala
@@ -11,17 +11,17 @@ import scala.xml.Node
 class ScoverageHtmlWriter(sourceDirectories: Seq[File], outputDir: File, sourceEncoding: Option[String]) extends BaseReportWriter(sourceDirectories, outputDir) {
 
   // to be used by gradle-scoverage plugin
-  def this (sourceDirectories: Array[File], outputDir: File, sourceEncoding: Option[String]) {
+  def this (sourceDirectories: Array[File], outputDir: File, sourceEncoding: Option[String]) = {
     this (sourceDirectories.toSeq, outputDir, sourceEncoding)
   }
 
   // for backward compatibility only
-  def this (sourceDirectories: Seq[File], outputDir: File) {
+  def this (sourceDirectories: Seq[File], outputDir: File) = {
     this(sourceDirectories, outputDir, None);
   }
   
   // for backward compatibility only
-  def this (sourceDirectory: File, outputDir: File) {
+  def this (sourceDirectory: File, outputDir: File) = {
     this(Seq(sourceDirectory), outputDir)
   }
   
diff --git a/scalac-scoverage-plugin/src/main/scala/scoverage/report/ScoverageXmlWriter.scala b/scalac-scoverage-plugin/src/main/scala/scoverage/report/ScoverageXmlWriter.scala
index 33d63e10..0dd5dc8e 100644
--- a/scalac-scoverage-plugin/src/main/scala/scoverage/report/ScoverageXmlWriter.scala
+++ b/scalac-scoverage-plugin/src/main/scala/scoverage/report/ScoverageXmlWriter.scala
@@ -9,7 +9,7 @@ import scala.xml.{Node, PrettyPrinter}
 /** @author Stephen Samuel */
 class ScoverageXmlWriter(sourceDirectories: Seq[File], outputDir: File, debug: Boolean) extends BaseReportWriter(sourceDirectories, outputDir) {
 
-  def this (sourceDir: File, outputDir: File, debug: Boolean) {
+  def this (sourceDir: File, outputDir: File, debug: Boolean) = {
     this(Seq(sourceDir), outputDir, debug)
   }
 
diff --git a/scalac-scoverage-plugin/src/test/scala/scoverage/ScoverageCompiler.scala b/scalac-scoverage-plugin/src/test/scala/scoverage/ScoverageCompiler.scala
index cc2b6186..df19aa4a 100644
--- a/scalac-scoverage-plugin/src/test/scala/scoverage/ScoverageCompiler.scala
+++ b/scalac-scoverage-plugin/src/test/scala/scoverage/ScoverageCompiler.scala
@@ -29,7 +29,7 @@ object ScoverageCompiler {
 
     val path = s"./scalac-scoverage-plugin/target/scala-$ScalaVersion/test-generated-classes"
     new File(path).mkdirs()
-    s.d.value = path
+    s.outdir.value = path
     s
   }
 
diff --git a/scalac-scoverage-plugin/src/test/scala/scoverage/ScoverageHtmlWriterTest.scala b/scalac-scoverage-plugin/src/test/scala/scoverage/ScoverageHtmlWriterTest.scala
index 2ae4a514..e8f839b8 100644
--- a/scalac-scoverage-plugin/src/test/scala/scoverage/ScoverageHtmlWriterTest.scala
+++ b/scalac-scoverage-plugin/src/test/scala/scoverage/ScoverageHtmlWriterTest.scala
@@ -59,7 +59,7 @@ class ScoverageHtmlWriterTest extends AnyFunSuite {
     val htmls = List("overview.html", "coverage.sample.html")
 
     for (html <- htmls) {
-      val xml = XML.loadString(Source.fromFile(new File(outputDir, html)).getLines.mkString)
+      val xml = XML.loadString(Source.fromFile(new File(outputDir, html)).getLines().mkString)
       val links = for (node <- xml \\ "a") yield {
         node.attribute("href") match {
           case Some(url) => url.toString
@@ -77,7 +77,7 @@ class ScoverageHtmlWriterTest extends AnyFunSuite {
     coverage.add(statementForClassContainingHtml)
     val outputDir = writeCoverageToTemporaryDir(coverage)
 
-    val contentsOfFileWithEmbeddedHtml = Source.fromFile(new File(outputDir, "ClassContainingHtml.scala.html")).getLines.mkString
+    val contentsOfFileWithEmbeddedHtml = Source.fromFile(new File(outputDir, "ClassContainingHtml.scala.html")).getLines().mkString
     assert( !contentsOfFileWithEmbeddedHtml.contains("<div>HTML content</div>") )
     assert( contentsOfFileWithEmbeddedHtml.contains("&lt;div&gt;HTML content&lt;/div&gt;") )
   }
diff --git a/scalac-scoverage-runtime/js/src/main/scala/scalajssupport/FileWriter.scala b/scalac-scoverage-runtime/js/src/main/scala/scalajssupport/FileWriter.scala
index 60a8964e..dc01ec6f 100644
--- a/scalac-scoverage-runtime/js/src/main/scala/scalajssupport/FileWriter.scala
+++ b/scalac-scoverage-runtime/js/src/main/scala/scalajssupport/FileWriter.scala
@@ -9,7 +9,7 @@ class FileWriter(file: File, append: Boolean) {
   def this(file: String, append: Boolean) = this(new File(file), append)
 
   def append(csq: CharSequence) = {
-    File.write(file.getPath, csq.toString)
+    File.write(file.getPath(), csq.toString)
     this
   }
 
diff --git a/scalac-scoverage-runtime/js/src/main/scala/scalajssupport/Source.scala b/scalac-scoverage-runtime/js/src/main/scala/scalajssupport/Source.scala
index 61025477..f0dbdbaf 100644
--- a/scalac-scoverage-runtime/js/src/main/scala/scalajssupport/Source.scala
+++ b/scalac-scoverage-runtime/js/src/main/scala/scalajssupport/Source.scala
@@ -10,7 +10,7 @@ object Source {
   def fromFile(file: File) = {
     new OrigSource {
 
-      val iter = file.readFile.toCharArray.iterator
+      val iter = file.readFile().toCharArray.iterator
     }
   }
-}
\ No newline at end of file
+}
diff --git a/scalac-scoverage-runtime/shared/src/main/scala/scoverage/Invoker.scala b/scalac-scoverage-runtime/shared/src/main/scala/scoverage/Invoker.scala
index 8310c3d5..cfb93761 100644
--- a/scalac-scoverage-runtime/shared/src/main/scala/scoverage/Invoker.scala
+++ b/scalac-scoverage-runtime/shared/src/main/scala/scoverage/Invoker.scala
@@ -68,12 +68,12 @@ object Invoker {
       .find(name => name.endsWith("suite") || name.endsWith("spec") || name.endsWith("test"))
       .getOrElse("")
 
-  def measurementFile(dataDir: File): File = measurementFile(dataDir.getAbsolutePath)
+  def measurementFile(dataDir: File): File = measurementFile(dataDir.getAbsolutePath())
   def measurementFile(dataDir: String): File = new File(dataDir, MeasurementsPrefix + runtimeUUID + "."  + Thread.currentThread.getId)
 
   def findMeasurementFiles(dataDir: String): Array[File] = findMeasurementFiles(new File(dataDir))
   def findMeasurementFiles(dataDir: File): Array[File] = dataDir.listFiles(new FileFilter {
-    override def accept(pathname: File): Boolean = pathname.getName.startsWith(MeasurementsPrefix)
+    override def accept(pathname: File): Boolean = pathname.getName().startsWith(MeasurementsPrefix)
   })
 
   // loads all the invoked statement ids from the given files
diff --git a/scalac-scoverage-runtime/shared/src/test/scala/scoverage/InvokerMultiModuleTest.scala b/scalac-scoverage-runtime/shared/src/test/scala/scoverage/InvokerMultiModuleTest.scala
index 1f14ea62..296749f4 100644
--- a/scalac-scoverage-runtime/shared/src/test/scala/scoverage/InvokerMultiModuleTest.scala
+++ b/scalac-scoverage-runtime/shared/src/test/scala/scoverage/InvokerMultiModuleTest.scala
@@ -39,12 +39,12 @@ class InvokerMultiModuleTest extends AnyFunSuite with BeforeAndAfter {
 
   after {
     deleteMeasurementFiles()
-    measurementDir.foreach(_.delete)
+    measurementDir.foreach(_.delete())
   }
 
   private def deleteMeasurementFiles(): Unit = {
     measurementDir.foreach((md) => {
-      if (md.isDirectory)
+      if (md.isDirectory())
         md.listFiles().foreach(_.delete())
     })
   }