diff --git a/org.eclipse.corrosion.tests/src/org/eclipse/corrosion/launch/CargoArgsTest.java b/org.eclipse.corrosion.tests/src/org/eclipse/corrosion/launch/CargoArgsTest.java
index 1308d595..8eff2749 100644
--- a/org.eclipse.corrosion.tests/src/org/eclipse/corrosion/launch/CargoArgsTest.java
+++ b/org.eclipse.corrosion.tests/src/org/eclipse/corrosion/launch/CargoArgsTest.java
@@ -1,5 +1,5 @@
 /*********************************************************************
- * Copyright (c) 2019 Fraunhofer FOKUS and others.
+ * Copyright (c) 2019, 2021 Fraunhofer FOKUS and others.
  *
  * This program and the accompanying materials are made
  * available under the terms of the Eclipse Public License 2.0
@@ -21,64 +21,60 @@
 
 import org.junit.jupiter.api.Test;
 
-public class CargoArgsTest {
+class CargoArgsTest {
 
 	private static final String SEPARATOR = "--";
 
 	@Test
-	public void testOnlyCommand() {
+	void testOnlyCommand() {
 		String command = "fmt";
-		String[] input = { command };
-		CargoArgs result = CargoArgs.fromAllArguments(input);
+		CargoArgs result = CargoArgs.fromAllArguments(command);
 		assertEquals(command, result.command);
 		assertTrue(result.arguments.isEmpty());
 		assertTrue(result.options.isEmpty());
 	}
 
 	@Test
-	public void testOnlyCommandAndSeparator() {
+	void testOnlyCommandAndSeparator() {
 		String command = "fmt";
-		String[] input = { command, SEPARATOR };
-		CargoArgs result = CargoArgs.fromAllArguments(input);
+		CargoArgs result = CargoArgs.fromAllArguments(command, SEPARATOR);
 		assertEquals(command, result.command);
 		assertTrue(result.arguments.isEmpty());
 		assertTrue(result.options.isEmpty());
 	}
 
 	@Test
-	public void testOnlyCommandAndOptions() {
+	void testOnlyCommandAndOptions() {
 		String command = "build";
 		String opt1 = "--all";
 		String opt2 = "--release";
-		String[] input = { command, opt1, opt2 };
-		CargoArgs result = CargoArgs.fromAllArguments(input);
+		CargoArgs result = CargoArgs.fromAllArguments(command, opt1, opt2);
 		assertEquals(command, result.command);
 		assertEquals(Arrays.asList(opt1, opt2), result.options);
 		assertTrue(result.arguments.isEmpty());
 	}
 
 	@Test
-	public void testOnlyCommandAndOptionsAndSeparator() {
+	void testOnlyCommandAndOptionsAndSeparator() {
 		String command = "build";
 		String opt1 = "--all";
 		String opt2 = "--release";
-		String[] input = { command, opt1, opt2, SEPARATOR };
-		CargoArgs result = CargoArgs.fromAllArguments(input);
+		CargoArgs result = CargoArgs.fromAllArguments(command, opt1, opt2, SEPARATOR);
 		assertEquals(command, result.command);
 		assertEquals(Arrays.asList(opt1, opt2), result.options);
 		assertTrue(result.arguments.isEmpty());
 	}
 
 	@Test
-	public void testOnlyCommandAndArguments() {
+	void testOnlyCommandAndArguments() {
 		String command = "build";
-		List<String> arguments = Arrays.asList("--nocapture", "my_test");
+		List<String> arguments = List.of("--nocapture", "my_test");
 
 		List<String> all_arguments = new ArrayList<>();
 		all_arguments.add(command);
 		all_arguments.add(SEPARATOR);
 		all_arguments.addAll(arguments);
-		String[] input = all_arguments.toArray(new String[] {});
+		String[] input = all_arguments.toArray(String[]::new);
 
 		CargoArgs result = CargoArgs.fromAllArguments(input);
 
@@ -88,17 +84,17 @@ public void testOnlyCommandAndArguments() {
 	}
 
 	@Test
-	public void testOnlyCommandAndOptionsAndArguments() {
+	void testOnlyCommandAndOptionsAndArguments() {
 		String command = "build";
-		List<String> options = Arrays.asList("--all", "--release");
-		List<String> arguments = Arrays.asList("--nocapture", "my_test");
+		List<String> options = List.of("--all", "--release");
+		List<String> arguments = List.of("--nocapture", "my_test");
 
 		List<String> all_arguments = new ArrayList<>();
 		all_arguments.add(command);
 		all_arguments.addAll(options);
 		all_arguments.add(SEPARATOR);
 		all_arguments.addAll(arguments);
-		String[] input = all_arguments.toArray(new String[] {});
+		String[] input = all_arguments.toArray(String[]::new);
 
 		CargoArgs result = CargoArgs.fromAllArguments(input);
 
@@ -108,17 +104,17 @@ public void testOnlyCommandAndOptionsAndArguments() {
 	}
 
 	@Test
-	public void testOnlyCommandAndOptionsAndArgumentsIncludingSeparator() {
+	void testOnlyCommandAndOptionsAndArgumentsIncludingSeparator() {
 		String command = "build";
-		List<String> options = Arrays.asList("--all", "--release");
-		List<String> arguments = Arrays.asList("--nocapture", SEPARATOR, "my_test");
+		List<String> options = List.of("--all", "--release");
+		List<String> arguments = List.of("--nocapture", SEPARATOR, "my_test");
 
 		List<String> all_arguments = new ArrayList<>();
 		all_arguments.add(command);
 		all_arguments.addAll(options);
 		all_arguments.add(SEPARATOR);
 		all_arguments.addAll(arguments);
-		String[] input = all_arguments.toArray(new String[] {});
+		String[] input = all_arguments.toArray(String[]::new);
 
 		CargoArgs result = CargoArgs.fromAllArguments(input);
 
diff --git a/org.eclipse.corrosion.tests/src/org/eclipse/corrosion/launch/RLSRunCommandTest.java b/org.eclipse.corrosion.tests/src/org/eclipse/corrosion/launch/RLSRunCommandTest.java
index f7ba52d4..529701f4 100644
--- a/org.eclipse.corrosion.tests/src/org/eclipse/corrosion/launch/RLSRunCommandTest.java
+++ b/org.eclipse.corrosion.tests/src/org/eclipse/corrosion/launch/RLSRunCommandTest.java
@@ -30,7 +30,7 @@
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 
-public class RLSRunCommandTest {
+class RLSRunCommandTest {
 
 	private static final String TITLE = "Run test";
 	private static final String COMMAND_ID = "rls.run";
@@ -53,21 +53,21 @@ static Stream<Arguments> parameters() {
 
 	@ParameterizedTest
 	@MethodSource("parameters")
-	public void testMapEntryArgument(Map<String, Object> argument) {
+	void testMapEntryArgument(Map<String, Object> argument) {
 		Command command = new Command(TITLE, COMMAND_ID, Arrays.asList(argument));
 		Optional<RLSRunCommand> lspCommand = RLSRunCommand.fromLSPCommand(command);
 		assertFalse(lspCommand.isPresent());
 	}
 
 	@Test
-	public void testNoArgument() {
+	void testNoArgument() {
 		Command command = new Command(TITLE, COMMAND_ID, Arrays.asList());
 		Optional<RLSRunCommand> lspCommand = RLSRunCommand.fromLSPCommand(command);
 		assertFalse(lspCommand.isPresent());
 	}
 
 	@Test
-	public void testArgumentListNull() {
+	void testArgumentListNull() {
 		Command command = new Command(TITLE, COMMAND_ID, null);
 		Optional<RLSRunCommand> lspCommand = RLSRunCommand.fromLSPCommand(command);
 		assertFalse(lspCommand.isPresent());
@@ -81,7 +81,7 @@ public void testArgumentListWrongEntry() {
 	}
 
 	@Test
-	public void testEmptyArguments() {
+	void testEmptyArguments() {
 		Command command = new Command(TITLE, COMMAND_ID,
 				Arrays.asList(createArgument(VALID_BINARY, EMPTY_ARGS, EMPTY_ENV)));
 		Optional<RLSRunCommand> lspCommand = RLSRunCommand.fromLSPCommand(command);
@@ -93,7 +93,7 @@ public void testEmptyArguments() {
 	}
 
 	@Test
-	public void testValidArguments() {
+	void testValidArguments() {
 		Command command = new Command(TITLE, COMMAND_ID,
 				Arrays.asList(createArgument(VALID_BINARY, VALID_ARGS, VALID_ENV)));
 		Optional<RLSRunCommand> lspCommand = RLSRunCommand.fromLSPCommand(command);
@@ -105,7 +105,7 @@ public void testValidArguments() {
 	}
 
 	@Test
-	public void testInvalidEnvEntry() {
+	void testInvalidEnvEntry() {
 		Map<String, String> env = new HashMap<>();
 		env.put("INVALID", null);
 		env.put("RUST_BACKTRACE", "short");
diff --git a/org.eclipse.corrosion/src/org/eclipse/corrosion/launch/CargoArgs.java b/org.eclipse.corrosion/src/org/eclipse/corrosion/launch/CargoArgs.java
index d323d7ca..2e8a723b 100644
--- a/org.eclipse.corrosion/src/org/eclipse/corrosion/launch/CargoArgs.java
+++ b/org.eclipse.corrosion/src/org/eclipse/corrosion/launch/CargoArgs.java
@@ -1,5 +1,5 @@
 /*********************************************************************
- * Copyright (c) 2019 Fraunhofer FOKUS and others.
+ * Copyright (c) 2019, 2021 Fraunhofer FOKUS and others.
  *
  * This program and the accompanying materials are made
  * available under the terms of the Eclipse Public License 2.0
@@ -21,7 +21,7 @@
  * "test" or "run"), the options (flags for the command) and arguments (to be
  * passed to the executable called by cargo). Instances of this class can be
  * created via the static factory method
- * {@link CargoArgs#fromAllArguments(String[])}.
+ * {@link CargoArgs#fromAllArguments(String...)}.
  */
 class CargoArgs {
 	public final List<String> options;
@@ -53,7 +53,7 @@ private CargoArgs(List<String> options, List<String> arguments, String command)
 	 * @param args all arguments after a sub-command (e.g. )
 	 * @return instance of {@code CargoArgs} holding command, options and arguments
 	 */
-	public static CargoArgs fromAllArguments(String[] args) {
+	public static CargoArgs fromAllArguments(String... args) {
 
 		String resultCommand = ""; //$NON-NLS-1$
 		List<String> resultOptions = Collections.emptyList();
@@ -84,5 +84,4 @@ public static CargoArgs fromAllArguments(String[] args) {
 		}
 		return new CargoArgs(resultOptions, resultArguments, resultCommand);
 	}
-	// foo
 }
\ No newline at end of file