diff --git a/mmdbtype/types.go b/mmdbtype/types.go
index ac8fe1c..87c1fbd 100644
--- a/mmdbtype/types.go
+++ b/mmdbtype/types.go
@@ -9,9 +9,7 @@ import (
 	"math/big"
 	"math/bits"
 	"reflect"
-
-	// TODO: Once the min Go version is 1.21, switch this to "slices".
-	"golang.org/x/exp/slices"
+	"slices"
 )
 
 type typeNum byte
diff --git a/tree_test.go b/tree_test.go
index d98d1aa..3fdccf5 100644
--- a/tree_test.go
+++ b/tree_test.go
@@ -691,7 +691,7 @@ func TestTreeInsertAndGet(t *testing.T) {
 
 					assert.Equal(t, int64(buf.Len()), numBytes, "number of bytes")
 
-					f, err := os.CreateTemp("", "mmdbwriter")
+					f, err := os.CreateTemp(t.TempDir(), "mmdbwriter")
 					require.NoError(t, err)
 					defer func() { require.NoError(t, os.Remove(f.Name())) }()