diff --git a/src/cmd/compile/internal/noder/helpers.go b/src/cmd/compile/internal/noder/helpers.go
index 33acd6051ace8..8efcef26cf241 100644
--- a/src/cmd/compile/internal/noder/helpers.go
+++ b/src/cmd/compile/internal/noder/helpers.go
@@ -39,10 +39,6 @@ func typed(typ *types.Type, n ir.Node) ir.Node {
 
 // Values
 
-func Const(pos src.XPos, typ *types.Type, val constant.Value) ir.Node {
-	return typed(typ, ir.NewBasicLit(pos, val))
-}
-
 func OrigConst(pos src.XPos, typ *types.Type, val constant.Value, op ir.Op, raw string) ir.Node {
 	orig := ir.NewRawOrigExpr(pos, op, raw)
 	return ir.NewConstExpr(val, typed(typ, orig))
diff --git a/test/fixedbugs/issue7921.go b/test/fixedbugs/issue7921.go
index 65be4b5bbee8d..f9efb7f55dd46 100644
--- a/test/fixedbugs/issue7921.go
+++ b/test/fixedbugs/issue7921.go
@@ -41,7 +41,7 @@ func bufferNoEscape3(xs []string) string { // ERROR "xs does not escape$"
 
 func bufferNoEscape4() []byte {
 	var b bytes.Buffer
-	b.Grow(64) // ERROR "bufferNoEscape4 ignoring self-assignment in bytes.b.buf = bytes.b.buf\[:bytes.m\]$" "inlining call to bytes.\(\*Buffer\).Grow$" "string\(.*\) escapes to heap"
+	b.Grow(64) // ERROR "bufferNoEscape4 ignoring self-assignment in bytes.b.buf = bytes.b.buf\[:bytes.m\]$" "inlining call to bytes.\(\*Buffer\).Grow$" `".+" escapes to heap`
 	useBuffer(&b)
 	return b.Bytes() // ERROR "inlining call to bytes.\(\*Buffer\).Bytes$"
 }
diff --git a/test/run.go b/test/run.go
index 866654629e918..ff3cc1aabb692 100644
--- a/test/run.go
+++ b/test/run.go
@@ -1997,7 +1997,6 @@ var unifiedFailures = setOf(
 	"escape4.go",  // unified IR can inline f5 and f6; test doesn't expect this
 	"inline.go",   // unified IR reports function literal diagnostics on different lines than -d=inlfuncswithclosures
 
-	"fixedbugs/issue7921.go",  // prints "… escapes to heap", but test expects "string(…) escapes to heap"
 	"typeparam/issue47631.go", // unified IR can handle local type declarations
 )