diff --git a/x-pack/packages/kbn-elastic-assistant/impl/assistant/api/index.tsx b/x-pack/packages/kbn-elastic-assistant/impl/assistant/api/index.tsx
index 76d7ffa7daf8d..b3ae64bc99860 100644
--- a/x-pack/packages/kbn-elastic-assistant/impl/assistant/api/index.tsx
+++ b/x-pack/packages/kbn-elastic-assistant/impl/assistant/api/index.tsx
@@ -80,8 +80,10 @@ export const fetchConnectorExecuteAction = async ({
     replacements,
     isEnabledKnowledgeBase,
     isEnabledRAGAlerts,
-    langSmithProject: traceOptions?.langSmithProject,
-    langSmithApiKey: traceOptions?.langSmithApiKey,
+    langSmithProject:
+      traceOptions?.langSmithProject === '' ? undefined : traceOptions?.langSmithProject,
+    langSmithApiKey:
+      traceOptions?.langSmithApiKey === '' ? undefined : traceOptions?.langSmithApiKey,
     ...optionalRequestParams,
   };
 
diff --git a/x-pack/plugins/elastic_assistant/server/routes/evaluate/utils.ts b/x-pack/plugins/elastic_assistant/server/routes/evaluate/utils.ts
index b2b09cb1666d9..17757b8778771 100644
--- a/x-pack/plugins/elastic_assistant/server/routes/evaluate/utils.ts
+++ b/x-pack/plugins/elastic_assistant/server/routes/evaluate/utils.ts
@@ -124,7 +124,7 @@ export const getLangSmithTracer = ({
       return [];
     }
     const lcTracer = new LangChainTracer({
-      projectName: projectName ?? 'default', // Shows as the 'test' run's 'name' in langsmith ui
+      projectName, // Shows as the 'test' run's 'name' in langsmith ui
       exampleId,
       client: new Client({ apiKey }),
     });