diff --git a/src/NUnitEngine/nunit.engine/Services/TestSelectionParser.cs b/src/NUnitEngine/nunit.engine/Services/TestSelectionParser.cs
index ef3fb4cf8..387836edf 100644
--- a/src/NUnitEngine/nunit.engine/Services/TestSelectionParser.cs
+++ b/src/NUnitEngine/nunit.engine/Services/TestSelectionParser.cs
@@ -126,6 +126,7 @@ public string ParseFilterElement()
                 case "name":
                 case "test":
                 case "namespace":
+                case "partition":
                     Token op = lhs.Text == "id"
                         ? Expect(EQ_OPS)
                         : Expect(REL_OPS);