diff --git a/crates/collab/migrations.sqlite/20221109000000_test_schema.sql b/crates/collab/migrations.sqlite/20221109000000_test_schema.sql
index ccb09af454..9914831bba 100644
--- a/crates/collab/migrations.sqlite/20221109000000_test_schema.sql
+++ b/crates/collab/migrations.sqlite/20221109000000_test_schema.sql
@@ -49,7 +49,7 @@ CREATE TABLE "projects" (
 
 CREATE TABLE "worktrees" (
     "id" INTEGER NOT NULL,
-    "project_id" INTEGER NOT NULL REFERENCES projects (id),
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
     "root_name" VARCHAR NOT NULL,
     "abs_path" VARCHAR NOT NULL,
     "visible" BOOL NOT NULL,
@@ -71,7 +71,7 @@ CREATE TABLE "worktree_entries" (
     "is_symlink" BOOL NOT NULL,
     "is_ignored" BOOL NOT NULL,
     PRIMARY KEY(project_id, worktree_id, id),
-    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id)
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE
 );
 CREATE INDEX "index_worktree_entries_on_project_id_and_worktree_id" ON "worktree_entries" ("project_id", "worktree_id");
 
@@ -83,13 +83,13 @@ CREATE TABLE "worktree_diagnostic_summaries" (
     "error_count" INTEGER NOT NULL,
     "warning_count" INTEGER NOT NULL,
     PRIMARY KEY(project_id, worktree_id, path),
-    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id)
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE
 );
 CREATE INDEX "index_worktree_diagnostic_summaries_on_project_id_and_worktree_id" ON "worktree_diagnostic_summaries" ("project_id", "worktree_id");
 
 CREATE TABLE "language_servers" (
     "id" INTEGER NOT NULL,
-    "project_id" INTEGER NOT NULL REFERENCES projects (id),
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
     "name" VARCHAR NOT NULL,
     PRIMARY KEY(project_id, id)
 );
@@ -97,7 +97,7 @@ CREATE INDEX "index_language_servers_on_project_id" ON "language_servers" ("proj
 
 CREATE TABLE "project_collaborators" (
     "id" INTEGER PRIMARY KEY,
-    "project_id" INTEGER NOT NULL REFERENCES projects (id),
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
     "connection_id" INTEGER NOT NULL,
     "user_id" INTEGER NOT NULL,
     "replica_id" INTEGER NOT NULL,
diff --git a/crates/collab/migrations/20221111092550_reconnection_support.sql b/crates/collab/migrations/20221111092550_reconnection_support.sql
index e0e594d46e..8cd53726fd 100644
--- a/crates/collab/migrations/20221111092550_reconnection_support.sql
+++ b/crates/collab/migrations/20221111092550_reconnection_support.sql
@@ -11,7 +11,7 @@ ALTER TABLE "projects"
 
 CREATE TABLE "worktrees" (
     "id" INTEGER NOT NULL,
-    "project_id" INTEGER NOT NULL REFERENCES projects (id),
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
     "root_name" VARCHAR NOT NULL,
     "abs_path" VARCHAR NOT NULL,
     "visible" BOOL NOT NULL,
@@ -33,7 +33,7 @@ CREATE TABLE "worktree_entries" (
     "is_symlink" BOOL NOT NULL,
     "is_ignored" BOOL NOT NULL,
     PRIMARY KEY(project_id, worktree_id, id),
-    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id)
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE
 );
 CREATE INDEX "index_worktree_entries_on_project_id_and_worktree_id" ON "worktree_entries" ("project_id", "worktree_id");
 
@@ -45,13 +45,13 @@ CREATE TABLE "worktree_diagnostic_summaries" (
     "error_count" INTEGER NOT NULL,
     "warning_count" INTEGER NOT NULL,
     PRIMARY KEY(project_id, worktree_id, path),
-    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id)
+    FOREIGN KEY(project_id, worktree_id) REFERENCES worktrees (project_id, id) ON DELETE CASCADE
 );
 CREATE INDEX "index_worktree_diagnostic_summaries_on_project_id_and_worktree_id" ON "worktree_diagnostic_summaries" ("project_id", "worktree_id");
 
 CREATE TABLE "language_servers" (
     "id" INTEGER NOT NULL,
-    "project_id" INTEGER NOT NULL REFERENCES projects (id),
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
     "name" VARCHAR NOT NULL,
     PRIMARY KEY(project_id, id)
 );
@@ -59,7 +59,7 @@ CREATE INDEX "index_language_servers_on_project_id" ON "language_servers" ("proj
 
 CREATE TABLE "project_collaborators" (
     "id" INTEGER PRIMARY KEY,
-    "project_id" INTEGER NOT NULL REFERENCES projects (id),
+    "project_id" INTEGER NOT NULL REFERENCES projects (id) ON DELETE CASCADE,
     "connection_id" INTEGER NOT NULL,
     "user_id" INTEGER NOT NULL,
     "replica_id" INTEGER NOT NULL,