diff --git a/tests/Base64.Tests.ps1 b/tests/Base64.Tests.ps1
index 9d0002d..07fa1c7 100644
--- a/tests/Base64.Tests.ps1
+++ b/tests/Base64.Tests.ps1
@@ -1,4 +1,6 @@
-BeforeAll {
+#Requires -Modules @{ ModuleName = 'Pester'; ModuleVersion = '6.0.0'; MaximumVersion = '6.*' }
+
+BeforeAll {
     # Import functions directly
     . "$PSScriptRoot/../src/functions/public/Test-Base64.ps1"
     . "$PSScriptRoot/../src/functions/public/ConvertTo-Base64.ps1"