diff --git a/X10D.Tests/src/Text/RuneTests.cs b/X10D.Tests/src/Text/RuneTests.cs
index 38f2fae..48e7501 100644
--- a/X10D.Tests/src/Text/RuneTests.cs
+++ b/X10D.Tests/src/Text/RuneTests.cs
@@ -1,4 +1,4 @@
-#if NETCOREAPP3_0_OR_GREATER
+#if NET5_0_OR_GREATER
 using System.Text;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using X10D.Text;