diff --git a/Tests/AzureDevOps.Account/AzureDevOps.Account.Tests.ps1 b/Tests/AzureDevOps.Account/AzureDevOps.Account.Tests.ps1
index a9d5059..f74bcfc 100644
--- a/Tests/AzureDevOps.Account/AzureDevOps.Account.Tests.ps1
+++ b/Tests/AzureDevOps.Account/AzureDevOps.Account.Tests.ps1
@@ -1,3 +1,5 @@
+#Requires -Modules @{ ModuleName = 'Pester'; ModuleVersion = '6.0.0'; MaximumVersion = '6.*' }
+
 $ModuleName = "AzureDevOps.Account";
 Import-Module "$PSScriptRoot\..\..\AzureDevOps\$ModuleName" -Force;
 
diff --git a/Tests/AzureDevOps.Account/Public/Add-AzureDevOpsAccount.Tests.ps1 b/Tests/AzureDevOps.Account/Public/Add-AzureDevOpsAccount.Tests.ps1
index b55dd04..8ba53c9 100644
--- a/Tests/AzureDevOps.Account/Public/Add-AzureDevOpsAccount.Tests.ps1
+++ b/Tests/AzureDevOps.Account/Public/Add-AzureDevOpsAccount.Tests.ps1
@@ -1,3 +1,5 @@
+#Requires -Modules @{ ModuleName = 'Pester'; ModuleVersion = '6.0.0'; MaximumVersion = '6.*' }
+
 Import-Module "$PSScriptRoot\..\..\..\AzureDevOps\AzureDevOps.Account" -Force;
 
 Describe "Add-AzureDevOpsAccount" {
diff --git a/Tests/AzureDevOps.Common/AzureDevOps.Common.Tests.ps1 b/Tests/AzureDevOps.Common/AzureDevOps.Common.Tests.ps1
index ec11b04..dcce624 100644
--- a/Tests/AzureDevOps.Common/AzureDevOps.Common.Tests.ps1
+++ b/Tests/AzureDevOps.Common/AzureDevOps.Common.Tests.ps1
@@ -1,3 +1,5 @@
+#Requires -Modules @{ ModuleName = 'Pester'; ModuleVersion = '6.0.0'; MaximumVersion = '6.*' }
+
 $ModuleName = "AzureDevOps.Common";
 Import-Module "$PSScriptRoot\..\..\AzureDevOps\$ModuleName" -Force;
 
diff --git a/Tests/AzureDevOps.Common/Public/Invoke-AzureDevOpsRestMethod.Tests.ps1 b/Tests/AzureDevOps.Common/Public/Invoke-AzureDevOpsRestMethod.Tests.ps1
index 3b5ef47..c1e8b76 100644
--- a/Tests/AzureDevOps.Common/Public/Invoke-AzureDevOpsRestMethod.Tests.ps1
+++ b/Tests/AzureDevOps.Common/Public/Invoke-AzureDevOpsRestMethod.Tests.ps1
@@ -1,3 +1,5 @@
+#Requires -Modules @{ ModuleName = 'Pester'; ModuleVersion = '6.0.0'; MaximumVersion = '6.*' }
+
 Import-Module "$PSScriptRoot\..\..\..\AzureDevOps\AzureDevOps.Common" -Force;
 
 Describe "Invoke-AzureDevOpsRestMethod" {
diff --git a/Tests/AzureDevOps.Packaging/AzureDevOps.Packaging.Tests.ps1 b/Tests/AzureDevOps.Packaging/AzureDevOps.Packaging.Tests.ps1
index 374a3d7..5e74231 100644
--- a/Tests/AzureDevOps.Packaging/AzureDevOps.Packaging.Tests.ps1
+++ b/Tests/AzureDevOps.Packaging/AzureDevOps.Packaging.Tests.ps1
@@ -1,3 +1,5 @@
+#Requires -Modules @{ ModuleName = 'Pester'; ModuleVersion = '6.0.0'; MaximumVersion = '6.*' }
+
 $ModuleName = "AzureDevOps.Packaging";
 Import-Module "$PSScriptRoot\..\..\AzureDevOps\$ModuleName" -Force;
 
diff --git a/Tests/AzureDevOps.Tests.ps1 b/Tests/AzureDevOps.Tests.ps1
index 659fd82..06fa83e 100644
--- a/Tests/AzureDevOps.Tests.ps1
+++ b/Tests/AzureDevOps.Tests.ps1
@@ -1,3 +1,5 @@
+#Requires -Modules @{ ModuleName = 'Pester'; ModuleVersion = '6.0.0'; MaximumVersion = '6.*' }
+
 $ModuleName = "AzureDevOps";
 $ModulePath = "$PSScriptRoot\..\$ModuleName"
 Import-Module $ModulePath -Force;
diff --git a/Tests/AzureDevOps.VariableGroups/AzureDevOps.VariableGroups.Tests.ps1 b/Tests/AzureDevOps.VariableGroups/AzureDevOps.VariableGroups.Tests.ps1
index 2f193dd..dbc7fc5 100644
--- a/Tests/AzureDevOps.VariableGroups/AzureDevOps.VariableGroups.Tests.ps1
+++ b/Tests/AzureDevOps.VariableGroups/AzureDevOps.VariableGroups.Tests.ps1
@@ -1,3 +1,5 @@
+#Requires -Modules @{ ModuleName = 'Pester'; ModuleVersion = '6.0.0'; MaximumVersion = '6.*' }
+
 $ModuleName = "AzureDevOps.VariableGroups";
 Import-Module "$PSScriptRoot\..\..\AzureDevOps\$ModuleName" -Force;