Code fixes

internal/socket/socket_test.go

@@ -49,7 +49,7 @@ func TestRoundTrip_Success(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Dial: %v", err)
 	}
-	defer c.Close()
+	defer func() { _ = c.Close() }()
 
 	var resp map[string]string
 	if err := c.Call(context.Background(), "echo", nil, &resp); err != nil {
@@ -71,7 +71,7 @@ func TestRoundTrip_Error(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Dial: %v", err)
 	}
-	defer c.Close()
+	defer func() { _ = c.Close() }()
 
 	err = c.Call(context.Background(), "status", nil, nil)
 	if err == nil {
@@ -98,7 +98,7 @@ func TestRoundTrip_BadJSON(t *testing.T) {
 	if err != nil {
 		t.Fatalf("dialRaw: %v", err)
 	}
-	defer conn.Close()
+	defer func() { _ = conn.Close() }()
 
 	if _, err := conn.Write([]byte("not json\n")); err != nil {
 		t.Fatalf("Write: %v", err)
@@ -140,7 +140,7 @@ func TestConcurrentCalls(t *testing.T) {
 				t.Errorf("Dial: %v", err)
 				return
 			}
-			defer c.Close()
+			defer func() { _ = c.Close() }()
 			for j := 0; j < callsEach; j++ {
 				var out map[string]int
 				err := c.Call(context.Background(), "echo",