Cleanup storage from all tests.

Fixed #3299

promql/bench_test.go

@@ -36,6 +36,7 @@ func NewBenchmark(b *testing.B, input string) *Benchmark {
 
 // Run runs the benchmark.
 func (b *Benchmark) Run() {
+	defer b.t.Close()
 	b.b.ReportAllocs()
 	b.b.ResetTimer()
 	for i := 0; i < b.b.N; i++ {

promql/engine_test.go

@@ -204,6 +204,8 @@ load 10s
 	if err != nil {
 		t.Fatalf("unexpected error creating test: %q", err)
 	}
+	defer test.Close()
+
 	err = test.Run()
 	if err != nil {
 		t.Fatalf("unexpected error initializing test: %q", err)