diff --git a/netmap/json_test.go b/netmap/json_test.go
index b8749d9..1f63852 100644
--- a/netmap/json_test.go
+++ b/netmap/json_test.go
@@ -2,6 +2,7 @@ package netmap
 
 import (
 	"encoding/json"
+	"fmt"
 	"os"
 	"path/filepath"
 	"testing"
@@ -47,7 +48,8 @@ func TestPlacementPolicy_Interopability(t *testing.T) {
 	require.NoError(t, err)
 
 	for i := range ds {
-		bs, err := os.ReadFile(filepath.Join(testsDir, ds[i].Name()))
+		filename := filepath.Join(testsDir, ds[i].Name())
+		bs, err := os.ReadFile(filename)
 		require.NoError(t, err)
 
 		var tc TestCase
@@ -56,7 +58,7 @@ func TestPlacementPolicy_Interopability(t *testing.T) {
 		srcNodes := make([]NodeInfo, len(tc.Nodes))
 		copy(srcNodes, tc.Nodes)
 
-		t.Run(tc.Name, func(t *testing.T) {
+		t.Run(fmt.Sprintf("%s:%s", filename, tc.Name), func(t *testing.T) {
 			var nm NetMap
 			nm.SetNodes(tc.Nodes)