diff --git a/crates/assistant2/src/history_store.rs b/crates/assistant2/src/history_store.rs
index 169f7561a138ac2d1fb632338c64edd8ccaddf8f..49f935314dd673ad016e572e732e16a43fb15120 100644
--- a/crates/assistant2/src/history_store.rs
+++ b/crates/assistant2/src/history_store.rs
@@ -43,6 +43,11 @@ impl HistoryStore {
     pub fn entries(&self, cx: &mut Context<Self>) -> Vec<HistoryEntry> {
         let mut history_entries = Vec::new();
 
+        #[cfg(debug_assertions)]
+        if std::env::var("ZED_SIMULATE_NO_THREAD_HISTORY").is_ok() {
+            return history_entries;
+        }
+
         for thread in self.thread_store.update(cx, |this, _cx| this.threads()) {
             history_entries.push(HistoryEntry::Thread(thread));
         }
diff --git a/crates/language_model/src/registry.rs b/crates/language_model/src/registry.rs
index c3c6b3bb036a59bfc11d8f70aee5363da580558d..0c7d3f167f84f68e6e8470cb695d9c57d6389017 100644
--- a/crates/language_model/src/registry.rs
+++ b/crates/language_model/src/registry.rs
@@ -203,6 +203,11 @@ impl LanguageModelRegistry {
     }
 
     pub fn active_provider(&self) -> Option<Arc<dyn LanguageModelProvider>> {
+        #[cfg(debug_assertions)]
+        if std::env::var("ZED_SIMULATE_NO_LLM_PROVIDER").is_ok() {
+            return None;
+        }
+
         Some(self.active_model.as_ref()?.provider.clone())
     }