diff --git a/Makefile b/Makefile
index 87bcee697..45b1df78c 100644
--- a/Makefile
+++ b/Makefile
@@ -31,6 +31,9 @@ vendor: go.mod
 test:
 	go test ./... -tags='$(BUILD_TAGS)' $(TESTFLAGS)
 
+bench:
+	go test ./... -bench=. -run=NoneZ -timeout=127m $(TESTFLAGS)
+
 # Run test suite with coverage enabled
 cover:
 	mkdir -p build
diff --git a/fragment_internal_test.go b/fragment_internal_test.go
index 71d3b5ebe..9a9bf910a 100644
--- a/fragment_internal_test.go
+++ b/fragment_internal_test.go
@@ -1987,7 +1987,7 @@ func BenchmarkFragment_Import(b *testing.B) {
 var (
 	rowCases         = []uint64{2, 50, 1000, 100000}
 	colCases         = []uint64{20, 1000, 50000, 500000}
-	concurrencyCases = []int{2, 4, 8, 16}
+	concurrencyCases = []int{2, 16}
 )
 
 func BenchmarkImportRoaring(b *testing.B) {