diff --git a/src/org/labkey/test/tests/core/admin/AllowedFileExtensionTest.java b/src/org/labkey/test/tests/core/admin/AllowedFileExtensionTest.java
index 70b95debb2..e20c43fb95 100644
--- a/src/org/labkey/test/tests/core/admin/AllowedFileExtensionTest.java
+++ b/src/org/labkey/test/tests/core/admin/AllowedFileExtensionTest.java
@@ -381,7 +381,7 @@ public void testAllowedFileExtensionsInSampleType()
         {
             fieldMap = Map.of("Name", String.format("S-%d", i), stFileField, fileMap.get(allowedType).getAbsolutePath());
             sampleTypeHelper.insertRow(fieldMap);
-            expectedValues.add(String.format(" sampletype/%s", fileMap.get(allowedType).getName()));
+            expectedValues.add(String.format(" sampletype%s%s", File.separator, fileMap.get(allowedType).getName()));
             i++;
         }