diff --git a/testsuite/tests/gadt/gadt11.stderr b/testsuite/tests/gadt/gadt11.stderr
index b753bd961cafe0ad729b978c66c7a726e803dcdc..c2e63f0716cff05cce6dd4b3bd4c3ceecd7e261c 100644
--- a/testsuite/tests/gadt/gadt11.stderr
+++ b/testsuite/tests/gadt/gadt11.stderr
@@ -1,6 +1,6 @@
 
 gadt11.hs:12:3:
     Data constructor ‛L2’ returns type ‛T1 Bool’
-      instead of an instance of its parent type ‛T2 a’
+      instead of an instance of its parent type ‛T2’
     In the definition of data constructor ‛L2’
     In the data declaration for ‛T2’
diff --git a/testsuite/tests/typecheck/should_fail/T7175.stderr b/testsuite/tests/typecheck/should_fail/T7175.stderr
index e65918c22b9484b115c3755efd40202f1548abab..f6adfff1288bddc21b06e85ca9cfa0cbfc053119 100644
--- a/testsuite/tests/typecheck/should_fail/T7175.stderr
+++ b/testsuite/tests/typecheck/should_fail/T7175.stderr
@@ -1,6 +1,6 @@
 
 T7175.hs:8:4:
     Data constructor ‛G1C’ returns type ‛F Int’
-      instead of an instance of its parent type ‛G1 a’
+      instead of an instance of its parent type ‛G1’
     In the definition of data constructor ‛G1C’
     In the data declaration for ‛G1’
diff --git a/testsuite/tests/typecheck/should_fail/tcfail155.stderr b/testsuite/tests/typecheck/should_fail/tcfail155.stderr
index 58426f4150724ea2bcbdb256e2ed2b58636ea946..15d6d6985663fbb1781ce06ab5d6640f002fcb6b 100644
--- a/testsuite/tests/typecheck/should_fail/tcfail155.stderr
+++ b/testsuite/tests/typecheck/should_fail/tcfail155.stderr
@@ -1,6 +1,6 @@
 
 tcfail155.hs:8:6:
     Data constructor ‛P’ returns type ‛L2’
-      instead of an instance of its parent type ‛T a’
+      instead of an instance of its parent type ‛T’
     In the definition of data constructor ‛P’
     In the data declaration for ‛T’
diff --git a/testsuite/tests/typecheck/should_fail/tcfail176.stderr b/testsuite/tests/typecheck/should_fail/tcfail176.stderr
index cb829b43afaa705b6ad3d67c688a4b946b763eb3..c19885a4377be5ecfd8c825734039ea9edda7ec5 100644
--- a/testsuite/tests/typecheck/should_fail/tcfail176.stderr
+++ b/testsuite/tests/typecheck/should_fail/tcfail176.stderr
@@ -1,6 +1,6 @@
 
 tcfail176.hs:7:21:
     Data constructor ‛Bug’ returns type ‛Maybe a’
-      instead of an instance of its parent type ‛Bug a’
+      instead of an instance of its parent type ‛Bug’
     In the definition of data constructor ‛Bug’
     In the newtype declaration for ‛Bug’