1 files changed, 4 insertions, 0 deletions

diff --git a/crates/ra_hir_expand/src/test_db.rs b/crates/ra_hir_expand/src/test_db.rs
index d23e75d9e..918736e2a 100644
--- a/crates/ra_hir_expand/src/test_db.rs
+++ b/crates/ra_hir_expand/src/test_db.rs
@@ -23,6 +23,10 @@ impl salsa::Database for TestDB {
         &self.runtime
     }
 
+    fn salsa_runtime_mut(&mut self) -> &mut salsa::Runtime<Self> {
+        &mut self.runtime
+    }
+
     fn salsa_event(&self, event: impl Fn() -> salsa::Event<TestDB>) {
         let mut events = self.events.lock().unwrap();
         if let Some(events) = &mut *events {