diff --git a/tools/lsp/src/lib.rs b/tools/lsp/src/lib.rs
index ce2cc4a5..6f5eb42d 100644
--- a/tools/lsp/src/lib.rs
+++ b/tools/lsp/src/lib.rs
@@ -1438,7 +1438,7 @@ impl LanguageServer for Backend {
         for diagnostic in params.context.diagnostics {
             if let Some(ref code) = diagnostic.code {
                 if let NumberOrString::String(ref s) = code {
-                    if s.contains("warning") {
+                    if s == "warning" {
                         let mut const_edits = Vec::new();
                         const_edits.push(TextEdit {
                             range: diagnostic.range,