diff --git a/database/database_test.go b/database/database_test.go
index 05dfe0f..d8e2d94 100644
--- a/database/database_test.go
+++ b/database/database_test.go
@@ -97,7 +97,7 @@ func testDatabase(t *testing.T, storageType string) {
 	}
 
 	cnt := 0
-	for _ = range it.Next {
+	for range it.Next {
 		cnt++
 	}
 	if it.Err() != nil {
diff --git a/database/storage/badger/badger_test.go b/database/storage/badger/badger_test.go
index 17fd971..32d8774 100644
--- a/database/storage/badger/badger_test.go
+++ b/database/storage/badger/badger_test.go
@@ -98,7 +98,7 @@ func TestBadger(t *testing.T) {
 		t.Fatal(err)
 	}
 	cnt := 0
-	for _ = range it.Next {
+	for range it.Next {
 		cnt++
 	}
 	if it.Err() != nil {
diff --git a/database/storage/bbolt/bbolt_test.go b/database/storage/bbolt/bbolt_test.go
index 8d8043f..631d89b 100644
--- a/database/storage/bbolt/bbolt_test.go
+++ b/database/storage/bbolt/bbolt_test.go
@@ -126,7 +126,7 @@ func TestBadger(t *testing.T) {
 		t.Fatal(err)
 	}
 	cnt := 0
-	for _ = range it.Next {
+	for range it.Next {
 		cnt++
 	}
 	if it.Err() != nil {
diff --git a/database/utils/kvops/kvops.go b/database/utils/kvops/kvops.go
deleted file mode 100644
index bf8ee70..0000000
--- a/database/utils/kvops/kvops.go
+++ /dev/null
@@ -1 +0,0 @@
-package kvops