diff --git a/src/cmd/compile/internal/types2/subst.go b/src/cmd/compile/internal/types2/subst.go
index db01c36f7a..7b4796fa2e 100644
--- a/src/cmd/compile/internal/types2/subst.go
+++ b/src/cmd/compile/internal/types2/subst.go
@@ -313,9 +313,6 @@ func (subst *subster) typ(typ Type) Type {
 		embeddeds, ecopied := subst.typeList(t.embeddeds)
 		if mcopied || ecopied {
 			iface := &Interface{methods: methods, embeddeds: embeddeds, complete: t.complete}
-			if subst.check == nil {
-				panic("internal error: cannot instantiate interfaces yet")
-			}
 			return iface
 		}
 
diff --git a/test/run.go b/test/run.go
index 713e2006dc..0251dc1c6a 100644
--- a/test/run.go
+++ b/test/run.go
@@ -2209,7 +2209,6 @@ var g3Failures = setOf(
 	"typeparam/mdempsky/3.go",
 	"typeparam/mdempsky/4.go",
 	"typeparam/mdempsky/5.go",
-	"typeparam/mdempsky/7.go",
 	"typeparam/mdempsky/9.go",
 	"typeparam/mdempsky/11.go",
 	"typeparam/mdempsky/12.go",