diff --git a/tests/org.eclipse.dltk.ruby.formatter.tests/.classpath b/tests/org.eclipse.dltk.ruby.formatter.tests/.classpath
index ad32c83..eca7bdb 100644
--- a/tests/org.eclipse.dltk.ruby.formatter.tests/.classpath
+++ b/tests/org.eclipse.dltk.ruby.formatter.tests/.classpath
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="output" path="bin"/>
diff --git a/tests/org.eclipse.dltk.ruby.formatter.tests/.settings/org.eclipse.jdt.core.prefs b/tests/org.eclipse.dltk.ruby.formatter.tests/.settings/org.eclipse.jdt.core.prefs
index cc8d94e..45b191c 100644
--- a/tests/org.eclipse.dltk.ruby.formatter.tests/.settings/org.eclipse.jdt.core.prefs
+++ b/tests/org.eclipse.dltk.ruby.formatter.tests/.settings/org.eclipse.jdt.core.prefs
@@ -10,9 +10,9 @@
 org.eclipse.jdt.core.compiler.annotation.nullanalysis=disabled
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.6
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=1.6
+org.eclipse.jdt.core.compiler.compliance=1.8
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -25,9 +25,9 @@
 org.eclipse.jdt.core.compiler.problem.deprecationInDeprecatedCode=disabled
 org.eclipse.jdt.core.compiler.problem.deprecationWhenOverridingDeprecatedMethod=disabled
 org.eclipse.jdt.core.compiler.problem.discouragedReference=ignore
-org.eclipse.jdt.core.compiler.problem.emptyStatement=ignore
+org.eclipse.jdt.core.compiler.problem.emptyStatement=warning
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
-org.eclipse.jdt.core.compiler.problem.explicitlyClosedAutoCloseable=ignore
+org.eclipse.jdt.core.compiler.problem.explicitlyClosedAutoCloseable=warning
 org.eclipse.jdt.core.compiler.problem.fallthroughCase=ignore
 org.eclipse.jdt.core.compiler.problem.fatalOptionalError=enabled
 org.eclipse.jdt.core.compiler.problem.fieldHiding=ignore
@@ -67,7 +67,7 @@
 org.eclipse.jdt.core.compiler.problem.rawTypeReference=warning
 org.eclipse.jdt.core.compiler.problem.redundantNullAnnotation=warning
 org.eclipse.jdt.core.compiler.problem.redundantNullCheck=warning
-org.eclipse.jdt.core.compiler.problem.redundantSpecificationOfTypeArguments=ignore
+org.eclipse.jdt.core.compiler.problem.redundantSpecificationOfTypeArguments=warning
 org.eclipse.jdt.core.compiler.problem.redundantSuperinterface=warning
 org.eclipse.jdt.core.compiler.problem.reportMethodCanBePotentiallyStatic=ignore
 org.eclipse.jdt.core.compiler.problem.reportMethodCanBeStatic=ignore
@@ -86,9 +86,9 @@
 org.eclipse.jdt.core.compiler.problem.unnecessaryElse=ignore
 org.eclipse.jdt.core.compiler.problem.unnecessaryTypeCheck=warning
 org.eclipse.jdt.core.compiler.problem.unqualifiedFieldAccess=ignore
-org.eclipse.jdt.core.compiler.problem.unusedDeclaredThrownException=ignore
-org.eclipse.jdt.core.compiler.problem.unusedDeclaredThrownExceptionExemptExceptionAndThrowable=enabled
-org.eclipse.jdt.core.compiler.problem.unusedDeclaredThrownExceptionIncludeDocCommentReference=enabled
+org.eclipse.jdt.core.compiler.problem.unusedDeclaredThrownException=warning
+org.eclipse.jdt.core.compiler.problem.unusedDeclaredThrownExceptionExemptExceptionAndThrowable=disabled
+org.eclipse.jdt.core.compiler.problem.unusedDeclaredThrownExceptionIncludeDocCommentReference=disabled
 org.eclipse.jdt.core.compiler.problem.unusedDeclaredThrownExceptionWhenOverriding=disabled
 org.eclipse.jdt.core.compiler.problem.unusedExceptionParameter=ignore
 org.eclipse.jdt.core.compiler.problem.unusedImport=warning
@@ -103,7 +103,7 @@
 org.eclipse.jdt.core.compiler.problem.unusedTypeParameter=ignore
 org.eclipse.jdt.core.compiler.problem.unusedWarningToken=warning
 org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
-org.eclipse.jdt.core.compiler.source=1.6
+org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression=16
 org.eclipse.jdt.core.formatter.alignment_for_arguments_in_annotation=0
diff --git a/tests/org.eclipse.dltk.ruby.formatter.tests/.settings/org.eclipse.jdt.ui.prefs b/tests/org.eclipse.dltk.ruby.formatter.tests/.settings/org.eclipse.jdt.ui.prefs
index e25132f..7d5cec7 100644
--- a/tests/org.eclipse.dltk.ruby.formatter.tests/.settings/org.eclipse.jdt.ui.prefs
+++ b/tests/org.eclipse.dltk.ruby.formatter.tests/.settings/org.eclipse.jdt.ui.prefs
@@ -36,13 +36,13 @@
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
-sp_cleanup.remove_redundant_type_arguments=false
-sp_cleanup.remove_trailing_whitespaces=false
+sp_cleanup.remove_redundant_type_arguments=true
+sp_cleanup.remove_trailing_whitespaces=true
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=false
-sp_cleanup.remove_unused_imports=false
+sp_cleanup.remove_unused_imports=true
 sp_cleanup.remove_unused_local_variables=false
 sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
diff --git a/tests/org.eclipse.dltk.ruby.formatter.tests/META-INF/MANIFEST.MF b/tests/org.eclipse.dltk.ruby.formatter.tests/META-INF/MANIFEST.MF
index 1d2dadc..8207ce5 100644
--- a/tests/org.eclipse.dltk.ruby.formatter.tests/META-INF/MANIFEST.MF
+++ b/tests/org.eclipse.dltk.ruby.formatter.tests/META-INF/MANIFEST.MF
@@ -14,7 +14,7 @@
  org.eclipse.ui,
  org.eclipse.dltk.formatter,
  org.eclipse.dltk.formatter.tests
-Bundle-RequiredExecutionEnvironment: JavaSE-1.6
+Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Export-Package: org.eclipse.dltk.ruby.formatter.tests
 Bundle-Activator: org.eclipse.dltk.ruby.formatter.tests.RubyFormatterTestsPlugin
 Bundle-ActivationPolicy: lazy
diff --git a/tests/org.eclipse.dltk.ruby.formatter.tests/src/org/eclipse/dltk/ruby/formatter/tests/FormatRubyLibTest.java b/tests/org.eclipse.dltk.ruby.formatter.tests/src/org/eclipse/dltk/ruby/formatter/tests/FormatRubyLibTest.java
index c553d39..90f7319 100644
--- a/tests/org.eclipse.dltk.ruby.formatter.tests/src/org/eclipse/dltk/ruby/formatter/tests/FormatRubyLibTest.java
+++ b/tests/org.eclipse.dltk.ruby.formatter.tests/src/org/eclipse/dltk/ruby/formatter/tests/FormatRubyLibTest.java
@@ -70,9 +70,9 @@
 		if (!path.isFile()) {
 			fail(path + " is not found"); //$NON-NLS-1$
 		}
-		final ZipInputStream zipInputStream = new ZipInputStream(
-				new FileInputStream(path));
-		try {
+
+		try (final ZipInputStream zipInputStream = new ZipInputStream(
+				new FileInputStream(path))) {
 			final RubyFormatter f = new TestRubyFormatter();
 			ZipEntry entry;
 			while ((entry = zipInputStream.getNextEntry()) != null) {
@@ -110,12 +110,6 @@
 					zipInputStream.closeEntry();
 				}
 			}
-		} finally {
-			try {
-				zipInputStream.close();
-			} catch (IOException e) {
-				//
-			}
 		}
 		if (errorCount > 0) {
 			final String msg = "Syntax errors: " + errorCount;
diff --git a/tests/org.eclipse.dltk.ruby.formatter.tests/src/org/eclipse/dltk/ruby/formatter/tests/ParserTest.java b/tests/org.eclipse.dltk.ruby.formatter.tests/src/org/eclipse/dltk/ruby/formatter/tests/ParserTest.java
index dc09261..b6b55cc 100644
--- a/tests/org.eclipse.dltk.ruby.formatter.tests/src/org/eclipse/dltk/ruby/formatter/tests/ParserTest.java
+++ b/tests/org.eclipse.dltk.ruby.formatter.tests/src/org/eclipse/dltk/ruby/formatter/tests/ParserTest.java
@@ -99,7 +99,7 @@
 
 	private String createInput(final String id1, final String[] hereDoc1,
 			final String id2, final String[] hereDoc2) {
-		List<String> lines = new ArrayList<String>();
+		List<String> lines = new ArrayList<>();
 		lines.add("def myfunc");
 		lines.add("print <<\"" + id1 + "\", <<\"" + id2
 				+ "\",1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19");
@@ -113,7 +113,7 @@
 	}
 
 	private List<HeredocNode> selectHeredocNodes(RubyParserResult result) {
-		final List<HeredocNode> heredocNodes = new ArrayList<HeredocNode>();
+		final List<HeredocNode> heredocNodes = new ArrayList<>();
 		result.getAST().accept(new AbstractVisitor() {
 
 			@Override
@@ -152,7 +152,7 @@
 		final String input = "hash = { one: 1, two: 2 }";
 		RubyParserResult result = RubyParser.parse(input);
 		assertNotNull(result);
-		final List<Node> arrays = new ArrayList<Node>();
+		final List<Node> arrays = new ArrayList<>();
 		result.getAST().accept(new AbstractVisitor() {
 			@Override
 			protected Instruction visitNode(Node visited) {
diff --git a/tests/org.eclipse.dltk.ruby.formatter.tests/src/org/eclipse/dltk/ruby/formatter/tests/TestRubyFormatter.java b/tests/org.eclipse.dltk.ruby.formatter.tests/src/org/eclipse/dltk/ruby/formatter/tests/TestRubyFormatter.java
index d69f63d..41557b3 100644
--- a/tests/org.eclipse.dltk.ruby.formatter.tests/src/org/eclipse/dltk/ruby/formatter/tests/TestRubyFormatter.java
+++ b/tests/org.eclipse.dltk.ruby.formatter.tests/src/org/eclipse/dltk/ruby/formatter/tests/TestRubyFormatter.java
@@ -36,7 +36,7 @@
 	}
 
 	public static Map<String, Object> createTestingPreferences() {
-		final Map<String, Object> result = new HashMap<String, Object>();
+		final Map<String, Object> result = new HashMap<>();
 		for (int i = 0; i < INDENTING.length; ++i) {
 			result.put(INDENTING[i], Boolean.TRUE);
 		}