diff --git a/org.eclipse.jdt.ls.tests/.settings/org.eclipse.jdt.core.prefs b/org.eclipse.jdt.ls.tests/.settings/org.eclipse.jdt.core.prefs
index e19d7a2e81..ba153f0a08 100644
--- a/org.eclipse.jdt.ls.tests/.settings/org.eclipse.jdt.core.prefs
+++ b/org.eclipse.jdt.ls.tests/.settings/org.eclipse.jdt.core.prefs
@@ -1,14 +1,14 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=23
-org.eclipse.jdt.core.compiler.compliance=23
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.compliance=17
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.discouragedReference=ignore
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=23
+org.eclipse.jdt.core.compiler.source=17
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_type_members_on_columns=false
 org.eclipse.jdt.core.formatter.alignment_for_additive_operator=16