diff --git a/tsdb/ooo_head_read_test.go b/tsdb/ooo_head_read_test.go
index 8dca1ea59..b489c6e57 100644
--- a/tsdb/ooo_head_read_test.go
+++ b/tsdb/ooo_head_read_test.go
@@ -379,23 +379,15 @@ func TestOOOHeadChunkReader_LabelValues(t *testing.T) {
 	app := head.Appender(context.Background())
 
 	// Add in-order samples
-	_, err := app.Append(0, labels.Labels{
-		{Name: "foo", Value: "bar1"},
-	}, 100, 1)
+	_, err := app.Append(0, labels.FromStrings("foo", "bar1"), 100, 1)
 	require.NoError(t, err)
-	_, err = app.Append(0, labels.Labels{
-		{Name: "foo", Value: "bar2"},
-	}, 100, 2)
+	_, err = app.Append(0, labels.FromStrings("foo", "bar2"), 100, 2)
 	require.NoError(t, err)
 
 	// Add ooo samples for those series
-	_, err = app.Append(0, labels.Labels{
-		{Name: "foo", Value: "bar1"},
-	}, 90, 1)
+	_, err = app.Append(0, labels.FromStrings("foo", "bar1"), 90, 1)
 	require.NoError(t, err)
-	_, err = app.Append(0, labels.Labels{
-		{Name: "foo", Value: "bar2"},
-	}, 90, 2)
+	_, err = app.Append(0, labels.FromStrings("foo", "bar2"), 90, 2)
 	require.NoError(t, err)
 
 	require.NoError(t, app.Commit())
diff --git a/tsdb/querier_test.go b/tsdb/querier_test.go
index 3b44cef51..e6a75da2f 100644
--- a/tsdb/querier_test.go
+++ b/tsdb/querier_test.go
@@ -2160,7 +2160,7 @@ func TestBlockBaseSeriesSet(t *testing.T) {
 		{
 			series: []refdSeries{
 				{
-					lset: labels.New([]labels.Label{{Name: "a", Value: "a"}}...),
+					lset: labels.FromStrings("a", "a"),
 					chunks: []chunks.Meta{
 						{Ref: 29},
 						{Ref: 45},
@@ -2173,19 +2173,19 @@ func TestBlockBaseSeriesSet(t *testing.T) {
 					ref: 12,
 				},
 				{
-					lset: labels.New([]labels.Label{{Name: "a", Value: "a"}, {Name: "b", Value: "b"}}...),
+					lset: labels.FromStrings("a", "a", "b", "b"),
 					chunks: []chunks.Meta{
 						{Ref: 82}, {Ref: 23}, {Ref: 234}, {Ref: 65}, {Ref: 26},
 					},
 					ref: 10,
 				},
 				{
-					lset:   labels.New([]labels.Label{{Name: "b", Value: "c"}}...),
+					lset:   labels.FromStrings("b", "c"),
 					chunks: []chunks.Meta{{Ref: 8282}},
 					ref:    1,
 				},
 				{
-					lset: labels.New([]labels.Label{{Name: "b", Value: "b"}}...),
+					lset: labels.FromStrings("b", "b"),
 					chunks: []chunks.Meta{
 						{Ref: 829}, {Ref: 239}, {Ref: 2349}, {Ref: 659}, {Ref: 269},
 					},
@@ -2198,14 +2198,14 @@ func TestBlockBaseSeriesSet(t *testing.T) {
 		{
 			series: []refdSeries{
 				{
-					lset: labels.New([]labels.Label{{Name: "a", Value: "a"}, {Name: "b", Value: "b"}}...),
+					lset: labels.FromStrings("a", "a", "b", "b"),
 					chunks: []chunks.Meta{
 						{Ref: 82}, {Ref: 23}, {Ref: 234}, {Ref: 65}, {Ref: 26},
 					},
 					ref: 10,
 				},
 				{
-					lset:   labels.New([]labels.Label{{Name: "b", Value: "c"}}...),
+					lset:   labels.FromStrings("b", "c"),
 					chunks: []chunks.Meta{{Ref: 8282}},
 					ref:    3,
 				},