diff --git a/toolchain/check/testdata/generic/extend_type_completion.carbon b/toolchain/check/testdata/generic/extend_type_completion.carbon
index 360657d3bdf5..75f091812dba 100644
--- a/toolchain/check/testdata/generic/extend_type_completion.carbon
+++ b/toolchain/check/testdata/generic/extend_type_completion.carbon
@@ -103,14 +103,14 @@ constraint J(N:! i32) {
   extend require impls K(array(i32, N));
 }
 constraint I(N:! i32) {
-  // CHECK:STDERR: fail_constraint_extend_require_impls_does_need_complete_interface.carbon:[[@LINE+3]]:24: note: in `{}` used here [ResolvingSpecificHere]
+  // CHECK:STDERR: fail_constraint_extend_require_impls_does_need_complete_interface.carbon:[[@LINE+3]]:24: note: in `J(-1)` used here [ResolvingSpecificHere]
   // CHECK:STDERR:   extend require impls J(N);
   // CHECK:STDERR:                        ^~~~
   extend require impls J(N);
 }
 
 // I extends J extends K so the type of K is completed, but is invalid.
-// CHECK:STDERR: fail_constraint_extend_require_impls_does_need_complete_interface.carbon:[[@LINE+4]]:1: note: in `{}` used here [ResolvingSpecificHere]
+// CHECK:STDERR: fail_constraint_extend_require_impls_does_need_complete_interface.carbon:[[@LINE+4]]:1: note: in `I(-1)` used here [ResolvingSpecificHere]
 // CHECK:STDERR: var v: I(-1);
 // CHECK:STDERR: ^~~~~~~~~~~~
 // CHECK:STDERR:
diff --git a/toolchain/sem_ir/stringify.cpp b/toolchain/sem_ir/stringify.cpp
index d58fe1795ddf..449f001c346b 100644
--- a/toolchain/sem_ir/stringify.cpp
+++ b/toolchain/sem_ir/stringify.cpp
@@ -827,6 +827,12 @@ auto StringifySpecific(const File& sem_ir, SpecificId specific_id)
           sem_ir.interfaces().Get(interface_decl.interface_id), specific_id);
       break;
     }
+    case CARBON_KIND(NamedConstraintDecl constraint_decl): {
+      step_stack.PushEntityName(
+          sem_ir.named_constraints().Get(constraint_decl.named_constraint_id),
+          specific_id);
+      break;
+    }
     case CARBON_KIND(RequireImplsDecl _): {
       step_stack.Push("require");
       break;