diff --git a/eng/common/pipelines/templates/steps/save-package-properties.yml b/eng/common/pipelines/templates/steps/save-package-properties.yml
index 17fe7dec1bb8..5ac89da9cdee 100644
--- a/eng/common/pipelines/templates/steps/save-package-properties.yml
+++ b/eng/common/pipelines/templates/steps/save-package-properties.yml
@@ -34,7 +34,7 @@ steps:
             ${{ parameters.ScriptDirectory }}/Generate-PR-Diff.ps1
             -TargetPath '${{ parameters.TargetPath }}'
             -ArtifactPath '${{ parameters.DiffDirectory }}'
-            -ExcludePaths ('${{ convertToJson(parameters.ExcludePaths) }}' | convertFrom-Json)
+            -ExcludePaths ('${{ convertToJson(parameters.ExcludePaths) }}' | ConvertFrom-Json)
           pwsh: true
 
       # When running in PR mode, we want the detected changed services to be attached to the build as tags.
diff --git a/eng/common/scripts/Package-Properties.ps1 b/eng/common/scripts/Package-Properties.ps1
index 74abb0ce3bf3..bc7b5738e2d3 100644
--- a/eng/common/scripts/Package-Properties.ps1
+++ b/eng/common/scripts/Package-Properties.ps1
@@ -167,8 +167,9 @@ function Get-PrPkgProperties([string]$InputDiffJson) {
     # slashes "/". The ExcludePaths need to have a trailing slash added in order
     # correctly test for string matches without overmatching. For example, if a pr
     # had files sdk/foo/file1 and sdk/foobar/file2 with the exclude of anything in
-    # sdk/foo, it should only exclude things under sdk/foo.
-    $excludePaths = $diff.ExcludePaths | ForEach-Object { $_ + "/" }
+    # sdk/foo, it should only exclude things under sdk/foo. The TrimEnd is just in
+    # case one of the paths ends with a slash, it doesn't add a second one.
+    $excludePaths = $diff.ExcludePaths | ForEach-Object { $_.TrimEnd("/") + "/" }
 
     $additionalValidationPackages = @()
     $lookup = @{}