diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7dc600906..8131255ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- SqlTraceFlag
+  - Fixed Assembly not loaded error
+   ([issue #1680](https://github.com/dsccommunity/SqlServerDsc/issues/1680)).
+
 ### Changed
 
 - SqlLogin
diff --git a/source/DSCResources/DSC_SqlTraceFlag/DSC_SqlTraceFlag.psm1 b/source/DSCResources/DSC_SqlTraceFlag/DSC_SqlTraceFlag.psm1
index 24c0bdf28..63e3b61df 100644
--- a/source/DSCResources/DSC_SqlTraceFlag/DSC_SqlTraceFlag.psm1
+++ b/source/DSCResources/DSC_SqlTraceFlag/DSC_SqlTraceFlag.psm1
@@ -33,6 +33,9 @@ function Get-TargetResource
         $InstanceName
     )
 
+    # Import SqlServer module.
+    Import-SQLPSModule
+
     Write-Verbose -Message (
         $script:localizedData.GetConfiguration -f $InstanceName
     )
@@ -145,6 +148,9 @@ function Set-TargetResource
         $RestartTimeout = 120
     )
 
+    # Import SqlServer module.
+    Import-SQLPSModule
+
     Write-Verbose -Message (
         $script:localizedData.SetConfiguration -f $InstanceName
     )
diff --git a/tests/Unit/DSC_SqlTraceFlag.Tests.ps1 b/tests/Unit/DSC_SqlTraceFlag.Tests.ps1
index 7d5375c9f..a8c8e4a54 100644
--- a/tests/Unit/DSC_SqlTraceFlag.Tests.ps1
+++ b/tests/Unit/DSC_SqlTraceFlag.Tests.ps1
@@ -167,6 +167,7 @@ Server\MSSQL15.INST00\MSSQL\DATA\mastlog.ldf
                     return @($mockServerObject)
                 }
                 Mock -CommandName New-Object -MockWith $mockSmoWmiManagedComputer -ParameterFilter $mockNewObject_ParameterFilter_RealServerName -Verifiable
+                Mock -CommandName Import-SQLPSModule
             }
 
             Context 'For the default instance' {
@@ -353,6 +354,7 @@ Server\MSSQL15.INST00\MSSQL\DATA\mastlog.ldf
                     return @($mockServerObject)
                 }
                 Mock -CommandName New-Object -MockWith $mockSmoWmiManagedComputer -Verifiable
+                Mock -CommandName Import-SQLPSModule
             }
 
             Context 'When the system is not in the desired state and TraceFlags is empty' {
@@ -646,6 +648,7 @@ Server\MSSQL15.INST00\MSSQL\DATA\mastlog.ldf
                         }
                 Mock -CommandName New-Object -MockWith $mockSmoWmiManagedComputer -Verifiable
                 Mock -CommandName Restart-SqlService -ModuleName $script:dscResourceName -Verifiable
+                Mock -CommandName Import-SQLPSModule
             }
 
             Context 'When the system is not in the desired state and ensure is set to Absent' {