diff --git a/cmd/gorelease/testdata/errors/errors.test b/cmd/gorelease/testdata/errors/errors.test
index c5d5711..002a8fc 100644
--- a/cmd/gorelease/testdata/errors/errors.test
+++ b/cmd/gorelease/testdata/errors/errors.test
@@ -8,7 +8,7 @@
 example.com/errors/added
 ------------------------
 errors in release version:
-	added/added.go:3:15: cannot convert "not an int" (untyped string constant) to int
+	added/added.go:3:15: undeclared name: Missing
 
 Compatible changes:
 - package added
@@ -16,7 +16,7 @@
 example.com/errors/broken
 -------------------------
 errors in release version:
-	broken/broken.go:3:15: cannot convert "no longer an int" (untyped string constant) to int
+	broken/broken.go:3:15: undeclared name: Missing
 
 Incompatible changes:
 - X: value changed from 12 to unknown
@@ -24,7 +24,7 @@
 example.com/errors/deleted
 --------------------------
 errors in base version:
-	deleted/deleted.go:3:15: cannot convert "not an int" (untyped string constant) to int
+	deleted/deleted.go:3:15: undeclared name: Missing
 
 Incompatible changes:
 - package removed
@@ -32,7 +32,7 @@
 example.com/errors/fixed
 ------------------------
 errors in base version:
-	fixed/fixed.go:3:15: cannot convert "not an int" (untyped string constant) to int
+	fixed/fixed.go:3:15: undeclared name: Missing
 
 Incompatible changes:
 - X: value changed from unknown to 12
diff --git a/cmd/gorelease/testdata/mod/example.com_errors_v0.1.0.txt b/cmd/gorelease/testdata/mod/example.com_errors_v0.1.0.txt
index f049377..3ba57c4 100644
--- a/cmd/gorelease/testdata/mod/example.com_errors_v0.1.0.txt
+++ b/cmd/gorelease/testdata/mod/example.com_errors_v0.1.0.txt
@@ -13,12 +13,12 @@
 -- fixed/fixed.go --
 package fixed
 
-const X int = "not an int"
+const X int = Missing
 
 -- deleted/deleted.go --
 package deleted
 
-const X int = "not an int"
+const X int = Missing
 
 -- broken/broken.go --
 package broken
diff --git a/cmd/gorelease/testdata/mod/example.com_errors_v0.2.0.txt b/cmd/gorelease/testdata/mod/example.com_errors_v0.2.0.txt
index 1f01c27..668d59b 100644
--- a/cmd/gorelease/testdata/mod/example.com_errors_v0.2.0.txt
+++ b/cmd/gorelease/testdata/mod/example.com_errors_v0.2.0.txt
@@ -10,9 +10,9 @@
 -- broken/broken.go --
 package broken
 
-const X int = "no longer an int"
+const X int = Missing
 
 -- added/added.go --
 package added
 
-const X int = "not an int"
+const X int = Missing