diff --git a/storage/merge.go b/storage/merge.go
index f4d34b3584..465eb1265e 100644
--- a/storage/merge.go
+++ b/storage/merge.go
@@ -895,9 +895,6 @@ func (c *concatenatingChunkIterator) Next() bool {
 		c.curr = c.iterators[c.idx].At()
 		return true
 	}
-	if c.iterators[c.idx].Err() != nil {
-		return false
-	}
 	c.idx++
 	return c.Next()
 }
diff --git a/storage/merge_test.go b/storage/merge_test.go
index a12753955f..0564913a8e 100644
--- a/storage/merge_test.go
+++ b/storage/merge_test.go
@@ -868,65 +868,6 @@ func TestConcatenatingChunkSeriesMerger(t *testing.T) {
 	}
 }
 
-func TestConcatenatingChunkIterator(t *testing.T) {
-	chunk1, err := chunks.ChunkFromSamples([]chunks.Sample{fSample{t: 1, f: 10}})
-	require.NoError(t, err)
-	chunk2, err := chunks.ChunkFromSamples([]chunks.Sample{fSample{t: 2, f: 20}})
-	require.NoError(t, err)
-	chunk3, err := chunks.ChunkFromSamples([]chunks.Sample{fSample{t: 3, f: 30}})
-	require.NoError(t, err)
-
-	testError := errors.New("something went wrong")
-
-	testCases := map[string]struct {
-		iterators      []chunks.Iterator
-		expectedChunks []chunks.Meta
-		expectedError  error
-	}{
-		"many successful iterators": {
-			iterators: []chunks.Iterator{
-				NewListChunkSeriesIterator(chunk1, chunk2),
-				NewListChunkSeriesIterator(chunk3),
-			},
-			expectedChunks: []chunks.Meta{chunk1, chunk2, chunk3},
-		},
-		"single failing iterator": {
-			iterators: []chunks.Iterator{
-				errChunksIterator{err: testError},
-			},
-			expectedError: testError,
-		},
-		"some failing and some successful iterators": {
-			iterators: []chunks.Iterator{
-				NewListChunkSeriesIterator(chunk1, chunk2),
-				errChunksIterator{err: testError},
-				NewListChunkSeriesIterator(chunk3),
-			},
-			expectedChunks: []chunks.Meta{chunk1, chunk2}, // Should stop before advancing to last iterator.
-			expectedError:  testError,
-		},
-	}
-
-	for name, testCase := range testCases {
-		t.Run(name, func(t *testing.T) {
-			it := concatenatingChunkIterator{iterators: testCase.iterators}
-			var chks []chunks.Meta
-
-			for it.Next() {
-				chks = append(chks, it.At())
-			}
-
-			require.Equal(t, testCase.expectedChunks, chks)
-
-			if testCase.expectedError == nil {
-				require.NoError(t, it.Err())
-			} else {
-				require.EqualError(t, it.Err(), testCase.expectedError.Error())
-			}
-		})
-	}
-}
-
 type mockQuerier struct {
 	LabelQuerier