diff --git a/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalDependencyTest.java b/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalDependencyTest.java
index a867480..4b46507 100644
--- a/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalDependencyTest.java
+++ b/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalDependencyTest.java
@@ -13,10 +13,10 @@
 import static org.gradle.testkit.runner.TaskOutcome.SUCCESS;
 
 @DisplayName("Gradle Metal dependency resolution")
-public class MetalDependencyTest extends MetalTestBase
+class MetalDependencyTest extends MetalTestBase
 {
     @Test
-    public void subproject () throws IOException
+    void subproject () throws IOException
     {
         // base library
 
@@ -201,7 +201,7 @@ int main (int argc, char * argv [])
     }
 
     @Test
-    public void composite () throws IOException
+    void composite () throws IOException
     {
         // base library
 
@@ -400,7 +400,7 @@ int main (int argc, char * argv [])
     }
 
     @Test
-    public void libraryTest () throws IOException
+    void libraryTest () throws IOException
     {
         final var fooDir = projectDir.resolve("foo");
         Files.createDirectories(fooDir);
diff --git a/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalExtensionTest.java b/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalExtensionTest.java
index b573c81..8d5cff1 100644
--- a/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalExtensionTest.java
+++ b/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalExtensionTest.java
@@ -13,10 +13,10 @@
 import static org.gradle.testkit.runner.TaskOutcome.UP_TO_DATE;
 
 @DisplayName("Gradle Metal extension")
-public class MetalExtensionTest extends MetalTestBase
+class MetalExtensionTest extends MetalTestBase
 {
     @Test
-    public void archiveFileName () throws IOException
+    void archiveFileName () throws IOException
     {
         Files.writeString(projectDir.resolve("build.gradle.kts"),
             """         
@@ -43,7 +43,7 @@ public void archiveFileName () throws IOException
     }
 
     @Test
-    public void locateTool () throws IOException
+    void locateTool () throws IOException
     {
         Files.writeString(projectDir.resolve("build.gradle.kts"),
             """         
diff --git a/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalIxxPrecompileTest.java b/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalIxxPrecompileTest.java
index 959270c..2bf3dcf 100644
--- a/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalIxxPrecompileTest.java
+++ b/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalIxxPrecompileTest.java
@@ -14,10 +14,10 @@
 import static org.gradle.testkit.runner.TaskOutcome.SUCCESS;
 
 @DisplayName("Gradle Metal C++ module interface support")
-public class MetalIxxPrecompileTest extends MetalTestBase
+class MetalIxxPrecompileTest extends MetalTestBase
 {
     @Test
-    public void compile () throws IOException
+    void compile () throws IOException
     {
         Files.createDirectories(projectDir.resolve("src"));
 
diff --git a/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalLibraryTest.java b/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalLibraryTest.java
index 3ff6277..7731314 100644
--- a/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalLibraryTest.java
+++ b/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalLibraryTest.java
@@ -13,11 +13,11 @@
 import static org.gradle.testkit.runner.TaskOutcome.*;
 
 @DisplayName("Gradle Metal library project")
-public class MetalLibraryTest extends MetalTestBase
+class MetalLibraryTest extends MetalTestBase
 {
     @DisplayName("compile with Assembler sources")
     @Test
-    public void compileAsm () throws IOException
+    void compileAsm () throws IOException
     {
         Files.createDirectories(projectDir.resolve("src/main/asm"));
         Files.writeString(projectDir.resolve("src/main/asm/foo.s"),
@@ -117,7 +117,7 @@ public void compileAsm () throws IOException
 
     @DisplayName("compile with C sources")
     @Test
-    public void compileC () throws IOException
+    void compileC () throws IOException
     {
         Files.createDirectories(projectDir.resolve("src/main/cpp"));
         Files.writeString(projectDir.resolve("src/main/cpp/foo.h"),
@@ -226,7 +226,7 @@ int main (int argc, char *  argv[])
 
     @DisplayName("compile with C++ sources")
     @Test
-    public void compileCxx () throws IOException
+    void compileCxx () throws IOException
     {
         Files.createDirectories(projectDir.resolve("src/main/cpp"));
         Files.writeString(projectDir.resolve("src/main/cpp/foo.h"),
@@ -367,7 +367,7 @@ int main (int argc, char * argv[])
 
     @DisplayName("compile with no sources")
     @Test
-    public void empty () throws IOException
+    void empty () throws IOException
     {
         Files.writeString(projectDir.resolve("build.gradle.kts"),
             """         
diff --git a/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalTargetTest.java b/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalTargetTest.java
index 5bc1422..cd2c2aa 100644
--- a/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalTargetTest.java
+++ b/plugins/src/functionalTest/java/br/dev/pedrolamarao/gradle/metal/MetalTargetTest.java
@@ -1,18 +1,17 @@
 package br.dev.pedrolamarao.gradle.metal;
 
 import org.gradle.testkit.runner.GradleRunner;
+import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
 import java.nio.file.Files;
 
-/**
- * Gradle Metal target support.
- */
-public class MetalTargetTest extends MetalTestBase
+@DisplayName("Gradle Metal target support")
+class MetalTargetTest extends MetalTestBase
 {
     @Test
-    public void targets () throws IOException
+    void targets () throws IOException
     {
         Files.createDirectories(projectDir.resolve("src/main/cpp"));
         Files.writeString(projectDir.resolve("src/main/cpp/main.h"),