diff --git a/pkg/logql/matrix.go b/pkg/logql/matrix.go
index e2feaeb6bb46a..425846d78004d 100644
--- a/pkg/logql/matrix.go
+++ b/pkg/logql/matrix.go
@@ -44,13 +44,6 @@ func (m *MatrixStepper) Next() (bool, int64, promql.Vector) {
 		ln := len(series.Points)
 
 		if ln == 0 || series.Points[0].T != ts {
-			vec = append(vec, promql.Sample{
-				Point: promql.Point{
-					T: ts,
-					V: 0,
-				},
-				Metric: series.Metric,
-			})
 			continue
 		}
 
diff --git a/pkg/logql/matrix_test.go b/pkg/logql/matrix_test.go
index f979a0864da05..f55709df499be 100644
--- a/pkg/logql/matrix_test.go
+++ b/pkg/logql/matrix_test.go
@@ -45,20 +45,12 @@ func TestMatrixStepper(t *testing.T) {
 				Point:  promql.Point{T: start.UnixNano(), V: 0},
 				Metric: labels.Labels{{Name: "foo", Value: "bar"}},
 			},
-			promql.Sample{
-				Point:  promql.Point{T: start.UnixNano(), V: 0},
-				Metric: labels.Labels{{Name: "bazz", Value: "buzz"}},
-			},
 		},
 		{
 			promql.Sample{
 				Point:  promql.Point{T: start.Add(step).UnixNano() / int64(time.Millisecond), V: 1},
 				Metric: labels.Labels{{Name: "foo", Value: "bar"}},
 			},
-			promql.Sample{
-				Point:  promql.Point{T: start.Add(step).UnixNano() / int64(time.Millisecond), V: 0},
-				Metric: labels.Labels{{Name: "bazz", Value: "buzz"}},
-			},
 		},
 		{
 			promql.Sample{
@@ -75,10 +67,6 @@ func TestMatrixStepper(t *testing.T) {
 				Point:  promql.Point{T: start.Add(3*step).UnixNano() / int64(time.Millisecond), V: 3},
 				Metric: labels.Labels{{Name: "foo", Value: "bar"}},
 			},
-			promql.Sample{
-				Point:  promql.Point{T: start.Add(3*step).UnixNano() / int64(time.Millisecond), V: 0},
-				Metric: labels.Labels{{Name: "bazz", Value: "buzz"}},
-			},
 		},
 		{
 			promql.Sample{
@@ -95,21 +83,8 @@ func TestMatrixStepper(t *testing.T) {
 				Point:  promql.Point{T: start.Add(5*step).UnixNano() / int64(time.Millisecond), V: 5},
 				Metric: labels.Labels{{Name: "foo", Value: "bar"}},
 			},
-			promql.Sample{
-				Point:  promql.Point{T: start.Add(5*step).UnixNano() / int64(time.Millisecond), V: 0},
-				Metric: labels.Labels{{Name: "bazz", Value: "buzz"}},
-			},
-		},
-		{
-			promql.Sample{
-				Point:  promql.Point{T: start.Add(6*step).UnixNano() / int64(time.Millisecond), V: 0},
-				Metric: labels.Labels{{Name: "foo", Value: "bar"}},
-			},
-			promql.Sample{
-				Point:  promql.Point{T: start.Add(6*step).UnixNano() / int64(time.Millisecond), V: 0},
-				Metric: labels.Labels{{Name: "bazz", Value: "buzz"}},
-			},
 		},
+		{},
 	}
 
 	for i := 0; i <= int(end.Sub(start)/step); i++ {