diff --git a/core/vm/logger_test.go b/core/vm/logger_test.go
index cba7c7a0e..2ea7535a7 100644
--- a/core/vm/logger_test.go
+++ b/core/vm/logger_test.go
@@ -46,7 +46,7 @@ type dummyStatedb struct {
 	state.StateDB
 }
 
-func (dummyStatedb) GetRefund() uint64 { return 1337 }
+func (*dummyStatedb) GetRefund() uint64 { return 1337 }
 
 func TestStoreCapture(t *testing.T) {
 	var (
diff --git a/eth/tracers/tracer_test.go b/eth/tracers/tracer_test.go
index 52f29c83f..a45a12115 100644
--- a/eth/tracers/tracer_test.go
+++ b/eth/tracers/tracer_test.go
@@ -48,7 +48,7 @@ type dummyStatedb struct {
 	state.StateDB
 }
 
-func (dummyStatedb) GetRefund() uint64 { return 1337 }
+func (*dummyStatedb) GetRefund() uint64 { return 1337 }
 
 func runTrace(tracer *Tracer) (json.RawMessage, error) {
 	env := vm.NewEVM(vm.Context{BlockNumber: big.NewInt(1)}, &dummyStatedb{}, params.TestChainConfig, vm.Config{Debug: true, Tracer: tracer})