diff --git a/tests/Coerce.hs b/tests/Coerce.hs
index 031f3186..c1ca8b09 100644
--- a/tests/Coerce.hs
+++ b/tests/Coerce.hs
@@ -13,10 +13,14 @@ toInt = coerce
 toInts :: (Coercible a Int) => [a] -> [Int]
 toInts = coerce
 
+casbs :: (Coercible a b) => [a] -> [b]
+casbs = coerce
+
 main :: IO ()
 main = do
   print (toInt (NT 5))
   print (toInts [NT 1, NT 2] :: [Int])
+  print (casbs [NT 1, NT 2, NT 3] :: [Int])
   print (coerce (List [3::Int, 4]) :: [Int])
   print (coerce (List [NT 5, NT 6]) :: [NT])
   print (coerce (List [NT 7, NT 8]) :: [Int])
diff --git a/tests/Coerce.ref b/tests/Coerce.ref
new file mode 100644
index 00000000..257827f3
--- /dev/null
+++ b/tests/Coerce.ref
@@ -0,0 +1,6 @@
+5
+[1,2]
+[1,2,3]
+[3,4]
+[NT 5,NT 6]
+[7,8]
diff --git a/tests/Makefile b/tests/Makefile
index b3e2b14a..e6e84ffe 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -79,6 +79,7 @@ test:
 	$(TMHS) OrPat      && $(EVAL) > OrPat.out      && diff OrPat.ref OrPat.out
 	$(TMHS) PartRed    && $(EVAL) > PartRed.out    && diff PartRed.ref PartRed.out
 	$(TMHS) PatSyn     && $(EVAL) > PatSyn.out     && diff PatSyn.ref PatSyn.out
+	$(TMHS) Coerce     && $(EVAL) > Coerce.out     && diff Coerce.ref Coerce.out
 
 errtest:
 	sh errtester.sh $(MHS) < errmsg.test