diff --git a/tests/org.eclipse.e4.ui.tests.css.swt/META-INF/MANIFEST.MF b/tests/org.eclipse.e4.ui.tests.css.swt/META-INF/MANIFEST.MF
index 4ec7e3a71c5..1cb1884bb49 100644
--- a/tests/org.eclipse.e4.ui.tests.css.swt/META-INF/MANIFEST.MF
+++ b/tests/org.eclipse.e4.ui.tests.css.swt/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %Bundle-Name
 Bundle-SymbolicName: org.eclipse.e4.ui.tests.css.swt; singleton:=true
-Bundle-Version: 0.12.700.qualifier
+Bundle-Version: 0.12.800.qualifier
 Require-Bundle: org.eclipse.e4.ui.css.core,
  org.eclipse.e4.ui.css.swt,
  org.eclipse.e4.ui.css.swt.theme;bundle-version="0.9.1",
diff --git a/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/forms/SectionTest.java b/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/forms/SectionTest.java
index c20bc502771..81d687f44aa 100644
--- a/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/forms/SectionTest.java
+++ b/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/forms/SectionTest.java
@@ -57,9 +57,13 @@ protected Section createTestSection(String styleSheet) {
 	@Test
 	void testSectionColors() {
 		Section section = createTestSection(
-				"Section { swt-titlebar-color: #FF0000;" + "tb-toggle-color: #FF0000; "
-						+ "tb-toggle-hover-color: #00FF00; " + "background-color-gradient-titlebar: #00FF00; "
-						+ "background-color-titlebar: #0000FF; " + "border-color-titlebar: #00FF00}");
+				"""
+					Section { swt-titlebar-color: #FF0000;\
+					tb-toggle-color: #FF0000; \
+					tb-toggle-hover-color: #00FF00; \
+					background-color-gradient-titlebar: #00FF00; \
+					background-color-titlebar: #0000FF; \
+					border-color-titlebar: #00FF00}""");
 		assertNotNull(section.getTitleBarForeground());
 		assertEquals(RED, section.getTitleBarForeground().getRGB());
 		assertNotNull(section.getTitleBarBackground());
@@ -79,9 +83,13 @@ void testSectionColors() {
 	@Test
 	void testSectionResetColors() throws Exception {
 		Section section = createTestSection(
-				"Section { swt-titlebar-color: #FF0000;" + "tb-toggle-color: #FF0000; "
-						+ "tb-toggle-hover-color: #00FF00; " + "background-color-gradient-titlebar: #00FF00; "
-						+ "background-color-titlebar: #0000FF; " + "border-color-titlebar: #00FF00}");
+				"""
+					Section { swt-titlebar-color: #FF0000;\
+					tb-toggle-color: #FF0000; \
+					tb-toggle-hover-color: #00FF00; \
+					background-color-gradient-titlebar: #00FF00; \
+					background-color-titlebar: #0000FF; \
+					border-color-titlebar: #00FF00}""");
 
 		engine.reset();
 
diff --git a/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/CTabFolderTest.java b/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/CTabFolderTest.java
index 989ce7146f6..ccd2e666cda 100644
--- a/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/CTabFolderTest.java
+++ b/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/CTabFolderTest.java
@@ -295,10 +295,11 @@ void testRetrievePropertyNull() {
 	@Test
 	void testTopRightAsDescendentChild() {
 		ToolBar[] toolBars = createTestToolBars(
-				"CTabFolder.special ToolBar { background: #FF0000}\n" +
-						"CTabFolder ToolBar { background: #00FF00}\n" +
-						"CTabFolder.extraordinary ToolBar { background: #FFFFFF}\n" +
-				"ToolBar { background: #0000FF}");
+				"""
+					CTabFolder.special ToolBar { background: #FF0000}
+					CTabFolder ToolBar { background: #00FF00}
+					CTabFolder.extraordinary ToolBar { background: #FFFFFF}
+					ToolBar { background: #0000FF}""");
 
 		ToolBar barA = toolBars[0];
 		ToolBar barB = toolBars[1];
diff --git a/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/CTabItemTest.java b/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/CTabItemTest.java
index 17da5dff916..74e7d625bd8 100644
--- a/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/CTabItemTest.java
+++ b/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/CTabItemTest.java
@@ -250,9 +250,11 @@ void testFontsEditorStackClass() {
 		CTabFolder folder2 = createFolder(folder.getShell());
 
 		WidgetElement.setCSSClass(folder2, "editorStack");
-		engine = createEngine("CTabItem { font-size: 10 }" + "CTabItem:selected { font-size: 14; font-weight: bold }"
-				+ "CTabFolder.editorStack CTabItem { font-size: 11; }"
-				+ "CTabFolder.editorStack CTabItem:selected { font-size: 13; font-style: italic }", folder.getDisplay());
+		engine = createEngine("""
+			CTabItem { font-size: 10 }\
+			CTabItem:selected { font-size: 14; font-weight: bold }\
+			CTabFolder.editorStack CTabItem { font-size: 11; }\
+			CTabFolder.editorStack CTabItem:selected { font-size: 13; font-style: italic }""", folder.getDisplay());
 		engine.applyStyles(folder.getShell(), true);
 
 		folder.getShell().open();
@@ -305,10 +307,11 @@ void testFontsEditorStackClass2() {
 
 		WidgetElement.setCSSClass(folder2, "editorStack");
 		engine = createEngine(
-				"CTabItem { font-size: 10 }"
-						+ "CTabItem:selected { font-size: 14; font-weight: bold }"
-						+ "CTabFolder.editorStack CTabItem { font-size: 11; }"
-						+ "CTabFolder.editorStack CTabItem:selected { font-size: 13; font-weight: normal; font-style: italic }",
+				"""
+					CTabItem { font-size: 10 }\
+					CTabItem:selected { font-size: 14; font-weight: bold }\
+					CTabFolder.editorStack CTabItem { font-size: 11; }\
+					CTabFolder.editorStack CTabItem:selected { font-size: 13; font-weight: normal; font-style: italic }""",
 						folder.getDisplay());
 		engine.applyStyles(folder.getShell(), true);
 
@@ -361,8 +364,10 @@ void testShowCloseEditorStack() {
 		CTabFolder folder2 = createFolder(folder.getShell());
 
 		WidgetElement.setCSSClass(folder2, "editorStack");
-		engine = createEngine("CTabItem { show-close: false }" + "CTabItem:selected { show-close: true }"
-				+ "CTabFolder.editorStack CTabItem { show-close: true }", folder.getDisplay());
+		engine = createEngine("""
+			CTabItem { show-close: false }\
+			CTabItem:selected { show-close: true }\
+			CTabFolder.editorStack CTabItem { show-close: true }""", folder.getDisplay());
 		engine.applyStyles(folder.getShell(), true);
 
 		folder.getShell().open();
@@ -400,9 +405,11 @@ void testShowCloseViewStack() {
 		CTabFolder folder2 = createFolder(folder.getShell());
 
 		WidgetElement.setCSSClass(folder2, "viewStack");
-		engine = createEngine("CTabItem { show-close: false }" + "CTabItem:selected { show-close: true }"
-				+ "CTabFolder.viewStack CTabItem { show-close: false }"
-				+ "CTabFolder.viewStack CTabItem.selected { show-close: true }", folder.getDisplay());
+		engine = createEngine("""
+			CTabItem { show-close: false }\
+			CTabItem:selected { show-close: true }\
+			CTabFolder.viewStack CTabItem { show-close: false }\
+			CTabFolder.viewStack CTabItem.selected { show-close: true }""", folder.getDisplay());
 		engine.applyStyles(folder.getShell(), true);
 
 		folder.getShell().open();
diff --git a/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/IEclipsePreferencesTest.java b/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/IEclipsePreferencesTest.java
index cf71a54cbbd..e0ede18b14d 100644
--- a/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/IEclipsePreferencesTest.java
+++ b/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/IEclipsePreferencesTest.java
@@ -28,11 +28,13 @@ void testIEclipsePreferences() {
 		IEclipsePreferences preferences = new EclipsePreferences(null, "org.eclipse.jdt.ui") {};
 
 		engine = createEngine(
-				"IEclipsePreferences#org-eclipse-jdt-ui{preferences:"
-						+ "'semanticHighlighting.abstractClass.color=128,255,0',"
-						+ "'java_bracket=0,255,255',"
-						+ "'java_bracket_italic=true',"
-						+ "'java_bracket_underline='" + "}", display);
+				"""
+					IEclipsePreferences#org-eclipse-jdt-ui{preferences:\
+					'semanticHighlighting.abstractClass.color=128,255,0',\
+					'java_bracket=0,255,255',\
+					'java_bracket_italic=true',\
+					'java_bracket_underline='\
+					}""", display);
 		// when
 		engine.applyStyles(preferences, false);
 
diff --git a/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/InheritTest.java b/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/InheritTest.java
index 309bb8926e1..729b1338823 100644
--- a/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/InheritTest.java
+++ b/tests/org.eclipse.e4.ui.tests.css.swt/src/org/eclipse/e4/ui/tests/css/swt/InheritTest.java
@@ -67,9 +67,10 @@ void testBackgroundNoInherit() {
 	@Test
 	void testBackgroundInherit() throws Exception {
 		Label labelToTest = createTestLabel(
-				"Label { background-color: #00FF00; }\n"
-						+ "Composite { background-color: #FF0000; } \n"
-						+ "Composite Label { background-color: inherit; color: #0000FF; }",
+				"""
+					Label { background-color: #00FF00; }
+					Composite { background-color: #FF0000; }\s
+					Composite Label { background-color: inherit; color: #0000FF; }""",
 						false);
 		assertEquals(BLUE, labelToTest.getForeground().getRGB());
 		assertEquals(RED, labelToTest.getBackground().getRGB());