diff --git a/tests/org.eclipse.e4.core.tests/src/org/eclipse/e4/core/internal/tests/contexts/inject/GenericsListTest.java b/tests/org.eclipse.e4.core.tests/src/org/eclipse/e4/core/internal/tests/contexts/inject/GenericsListTest.java
index 011ae34..7746818 100644
--- a/tests/org.eclipse.e4.core.tests/src/org/eclipse/e4/core/internal/tests/contexts/inject/GenericsListTest.java
+++ b/tests/org.eclipse.e4.core.tests/src/org/eclipse/e4/core/internal/tests/contexts/inject/GenericsListTest.java
@@ -36,11 +36,11 @@
 		}
 
 		public String combineIt() {
-			String result = "";
+			StringBuilder stringBuilder = new StringBuilder();
 			for (String string : field) {
-				result += string;
+				stringBuilder.append(string);
 			}
-			return result;
+			return stringBuilder.toString();
 		}
 	}