diff --git a/test/core/src/lombok/RunTestsViaEcj.java b/test/core/src/lombok/RunTestsViaEcj.java
index 5f139095..3a0f02e2 100644
--- a/test/core/src/lombok/RunTestsViaEcj.java
+++ b/test/core/src/lombok/RunTestsViaEcj.java
@@ -95,6 +95,7 @@ public class RunTestsViaEcj extends AbstractRunTests {
 		warnings.put(CompilerOptions.OPTION_ReportNonStaticAccessToStatic, "warning");
 		warnings.put("org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures", "ignore");
 		warnings.put(CompilerOptions.OPTION_Source, (ecjCompilerVersion < 9 ? "1." : "") + ecjCompilerVersion);
+		warnings.put(CompilerOptions.OPTION_TargetPlatform, (ecjCompilerVersion < 9 ? "1." : "") + ecjCompilerVersion);
 		warnings.put("org.eclipse.jdt.core.compiler.codegen.useStringConcatFactory", "disabled");
 		options.set(warnings);
 		return options;