diff --git a/scripts/docker-integration-tests/query_fanout/restrict.go b/scripts/docker-integration-tests/query_fanout/restrict.go
index 8f2bb7f8ee..906a89f38c 100644
--- a/scripts/docker-integration-tests/query_fanout/restrict.go
+++ b/scripts/docker-integration-tests/query_fanout/restrict.go
@@ -325,7 +325,7 @@ type values []value
 type value []interface{}
 
 func (r *result) genID() result {
-	tags := make(sort.StringSlice, len(r.Metric))
+	tags := make(sort.StringSlice, 0, len(r.Metric))
 	for k, v := range r.Metric {
 		tags = append(tags, fmt.Sprintf("%s:%s,", k, v))
 	}
diff --git a/src/cmd/services/m3comparator/main/parser/parser.go b/src/cmd/services/m3comparator/main/parser/parser.go
index 1c5902b30d..a40110e00d 100644
--- a/src/cmd/services/m3comparator/main/parser/parser.go
+++ b/src/cmd/services/m3comparator/main/parser/parser.go
@@ -112,7 +112,7 @@ func (v *Value) UnmarshalJSON(data []byte) error {
 // IDOrGenID gets the ID for this result.
 func (r *Series) IDOrGenID() string {
 	if len(r.id) == 0 {
-		tags := make(sort.StringSlice, len(r.Tags))
+		tags := make(sort.StringSlice, 0, len(r.Tags))
 		for _, v := range r.Tags {
 			tags = append(tags, fmt.Sprintf("%s:%s,", v[0], v[1]))
 		}
diff --git a/src/dbnode/integration/integration_data_verify.go b/src/dbnode/integration/integration_data_verify.go
index 819a9d0a0d..58e800db8b 100644
--- a/src/dbnode/integration/integration_data_verify.go
+++ b/src/dbnode/integration/integration_data_verify.go
@@ -236,7 +236,7 @@ func writeVerifyDebugOutput(
 
 	list := make(readableSeriesList, 0, len(series))
 	for i := range series {
-		tags := make([]readableSeriesTag, len(series[i].Tags.Values()))
+		tags := make([]readableSeriesTag, 0, len(series[i].Tags.Values()))
 		for _, tag := range series[i].Tags.Values() {
 			tags = append(tags, readableSeriesTag{
 				Name:  tag.Name.String(),
diff --git a/src/query/api/v1/handler/prometheus/response.go b/src/query/api/v1/handler/prometheus/response.go
index a28384e162..badffdd50e 100644
--- a/src/query/api/v1/handler/prometheus/response.go
+++ b/src/query/api/v1/handler/prometheus/response.go
@@ -41,7 +41,7 @@ type data struct {
 	// ResultType is the type of Result (matrix, vector, etc.).
 	ResultType string
 	// Result contains the query result (concrete type depends on ResultType).
-	Result     result
+	Result result
 }
 
 type result interface {
@@ -169,7 +169,7 @@ type Values []Value
 type Value []interface{}
 
 func (t *Tags) genID() string {
-	tags := make(sort.StringSlice, len(*t))
+	tags := make(sort.StringSlice, 0, len(*t))
 	for k, v := range *t {
 		tags = append(tags, fmt.Sprintf("%s:%s,", k, v))
 	}