diff --git a/crates/ra_assists/src/lib.rs b/crates/ra_assists/src/lib.rs
index a2109b7512..be6e06842a 100644
--- a/crates/ra_assists/src/lib.rs
+++ b/crates/ra_assists/src/lib.rs
@@ -9,8 +9,6 @@ mod assist_ctx;
 mod marks;
 #[cfg(test)]
 mod doc_tests;
-#[cfg(test)]
-mod test_db;
 pub mod ast_transform;
 
 use either::Either;
diff --git a/crates/ra_assists/src/test_db.rs b/crates/ra_assists/src/test_db.rs
deleted file mode 100644
index d5249f3088..0000000000
--- a/crates/ra_assists/src/test_db.rs
+++ /dev/null
@@ -1,45 +0,0 @@
-//! Database used for testing `ra_assists`.
-
-use std::sync::Arc;
-
-use ra_db::{salsa, CrateId, FileId, FileLoader, FileLoaderDelegate, RelativePath};
-
-#[salsa::database(
-    ra_db::SourceDatabaseExtStorage,
-    ra_db::SourceDatabaseStorage,
-    hir::db::InternDatabaseStorage,
-    hir::db::AstDatabaseStorage,
-    hir::db::DefDatabaseStorage,
-    hir::db::HirDatabaseStorage
-)]
-#[derive(Debug, Default)]
-pub struct TestDB {
-    runtime: salsa::Runtime<TestDB>,
-}
-
-impl salsa::Database for TestDB {
-    fn salsa_runtime(&self) -> &salsa::Runtime<Self> {
-        &self.runtime
-    }
-    fn salsa_runtime_mut(&mut self) -> &mut salsa::Runtime<Self> {
-        &mut self.runtime
-    }
-}
-
-impl std::panic::RefUnwindSafe for TestDB {}
-
-impl FileLoader for TestDB {
-    fn file_text(&self, file_id: FileId) -> Arc<String> {
-        FileLoaderDelegate(self).file_text(file_id)
-    }
-    fn resolve_relative_path(
-        &self,
-        anchor: FileId,
-        relative_path: &RelativePath,
-    ) -> Option<FileId> {
-        FileLoaderDelegate(self).resolve_relative_path(anchor, relative_path)
-    }
-    fn relevant_crates(&self, file_id: FileId) -> Arc<Vec<CrateId>> {
-        FileLoaderDelegate(self).relevant_crates(file_id)
-    }
-}