diff --git a/model/histogram/histogram_test.go b/model/histogram/histogram_test.go
index 9d8514b04b..edc8663c94 100644
--- a/model/histogram/histogram_test.go
+++ b/model/histogram/histogram_test.go
@@ -613,7 +613,7 @@ func TestCustomBucketsHistogramToFloat(t *testing.T) {
 	require.NoError(t, h.Validate())
 	for _, c := range cases {
 		t.Run(c.name, func(t *testing.T) {
- 			hStr := h.String()
+			hStr := h.String()
 			fh := h.ToFloat(c.fh)
 			require.NoError(t, fh.Validate())
 			require.Equal(t, hStr, h.String())