diff --git a/ext/bloom/bloom_test.go b/ext/bloom/bloom_test.go
index 02c08fc..0a02942 100644
--- a/ext/bloom/bloom_test.go
+++ b/ext/bloom/bloom_test.go
@@ -26,7 +26,7 @@ func TestRegister(t *testing.T) {
 	defer db.Close()
 
 	err = db.Exec(`
-		CREATE VIRTUAL TABLE sports_cars USING bloom_filter(20);
+		CREATE VIRTUAL TABLE sports_cars USING bloom_filter();
 		INSERT INTO sports_cars VALUES ('ferrari'), ('lamborghini'), ('alfa romeo')
 	`)
 	if err != nil {
@@ -68,7 +68,22 @@ func TestRegister(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	err = db.Exec(`DROP TABLE sports_cars`)
+	err = db.Exec(`DELETE FROM sports_cars WHERE word = 'lamborghini'`)
+	if err == nil {
+		t.Error("want error")
+	}
+
+	err = db.Exec(`UPDATE sports_cars SET word = 'ferrari' WHERE word = 'lamborghini'`)
+	if err == nil {
+		t.Error("want error")
+	}
+
+	err = db.Exec(`ALTER TABLE sports_cars RENAME TO fast_cars`)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = db.Exec(`DROP TABLE fast_cars`)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -138,3 +153,42 @@ func Test_compatible(t *testing.T) {
 		t.Error(err)
 	}
 }
+
+func Test_errors(t *testing.T) {
+	t.Parallel()
+
+	db, err := sqlite3.Open(":memory:")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	bloom.Register(db)
+
+	err = db.Exec(`CREATE VIRTUAL TABLE sports_cars USING bloom_filter(0)`)
+	if err == nil {
+		t.Error("want error")
+	}
+	err = db.Exec(`CREATE VIRTUAL TABLE sports_cars USING bloom_filter('a')`)
+	if err == nil {
+		t.Error("want error")
+	}
+
+	err = db.Exec(`CREATE VIRTUAL TABLE sports_cars USING bloom_filter(20, 2)`)
+	if err == nil {
+		t.Error("want error")
+	}
+	err = db.Exec(`CREATE VIRTUAL TABLE sports_cars USING bloom_filter(20, 'a')`)
+	if err == nil {
+		t.Error("want error")
+	}
+
+	err = db.Exec(`CREATE VIRTUAL TABLE sports_cars USING bloom_filter(20, 0.9, 0)`)
+	if err == nil {
+		t.Error("want error")
+	}
+	err = db.Exec(`CREATE VIRTUAL TABLE sports_cars USING bloom_filter(20, 0.9, 'a')`)
+	if err == nil {
+		t.Error("want error")
+	}
+}
diff --git a/tests/func_test.go b/tests/func_test.go
index 08ee7ac..5b324ed 100644
--- a/tests/func_test.go
+++ b/tests/func_test.go
@@ -168,6 +168,44 @@ func TestCreateFunction(t *testing.T) {
 	}
 }
 
+func TestCreateFunction_error(t *testing.T) {
+	t.Parallel()
+
+	db, err := sqlite3.Open(":memory:")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	var want error
+	err = db.CreateFunction("test", 0, sqlite3.INNOCUOUS, func(ctx sqlite3.Context, _ ...sqlite3.Value) {
+		ctx.ResultError(want)
+	})
+
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	stmt, _, err := db.Prepare(`SELECT test()`)
+	if err != nil {
+		t.Error(err)
+	}
+	defer func() { recover() }()
+	defer stmt.Close()
+
+	for _, want = range []error{sqlite3.FULL, sqlite3.TOOBIG} {
+		if stmt.Step() {
+			t.Error("want error")
+		}
+		if got := stmt.Err(); !errors.Is(got, want) {
+			t.Errorf("got %v, want %v", got, want)
+		}
+	}
+
+	want = sqlite3.NOMEM
+	stmt.Step()
+}
+
 func TestOverloadFunction(t *testing.T) {
 	t.Parallel()