diff --git a/test-kit/src/test/scala/format/SmallFenTest.scala b/test-kit/src/test/scala/format/SmallFenTest.scala
index 58781d150..0f171eece 100644
--- a/test-kit/src/test/scala/format/SmallFenTest.scala
+++ b/test-kit/src/test/scala/format/SmallFenTest.scala
@@ -13,16 +13,25 @@ class SmallFenTest extends ChessTest:
       SmallFen.make(Standard, Fen.Simple("rnbqkb1r/ppp1pppp/3p4/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R b KQkq -")),
       SmallFen("rnbqkb1rppp1pppp3p43nP33P45N2PPP2PPPRNBQKB1RbKQkq")
     )
+
+  test("standard, skip w, b6 en passant"):
+    assertEquals(
+      SmallFen.make(Standard, Fen.Simple("8/8/p1k2nB1/Pp1np3/1PK4P/8/3B4/8 w - b6")).pp.garbageInefficientReadBackIntoFen,
+      SimpleFen("8/8/p1k2nB1/Pp1np3/1PK4P/8/3B4/8 w - b6")
+    )
+
   test("make standard correct, skip w"):
     assertEquals(
       SmallFen.make(Standard, Fen.Simple("rnbqkb1r/ppp1pppp/3p4/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -")),
       SmallFen("rnbqkb1rppp1pppp3p43nP33P45N2PPP2PPPRNBQKB1RKQkq")
     )
+
   test("make standard correct, non-initial castling"):
     assertEquals(
       SmallFen.make(Standard, Fen.Simple("rnbqkb1r/ppp1pppp/3p4/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R w Qq -")),
       SmallFen("rnbqkb1rppp1pppp3p43nP33P45N2PPP2PPPRNBQKB1RQq")
     )
+
   test("make standard correct, en passant"):
     assertEquals(
       SmallFen
@@ -144,7 +153,7 @@ class SmallFenTest extends ChessTest:
       "k7/2K5/8/2B5/8/p7/P7/8 b - -",
       "1k6/1P6/1K6/2P5/8/8/8/8 b - -",
       "8/8/5R2/8/8/8/7p/5K1k b - -",
-      "8/8/8/8/8/5p2/5K1p/7k b - -"
+      "8/8/8/8/8/5p2/5K1p/7k b - -",
     ).foreach: fen =>
       assertEquals(
         toFen(SmallFen.make(Standard, Fen.Simple(fen)).value),