pester test with Compare-Object fails in azure pipeline

Question

I am comparing two files which looks exactly alike, and when I test locally there is no problem, but when i run the test in my azure pipeline, the test fails and says it does not look alike.

I have no idea why or what to do for debugging?

    Context "Azure Hierarchy" {
        It "Article is updated" {
            $FileContent = Get-Content $AzureHierarchyDocsFilePath
            Compare-Object -ReferenceObject $AzureHierarchy -DifferenceObject $FileContent -CaseSensitive |
            Should -BeNullOrEmpty 
        }
    }