diff --git a/cmd/mesh-controller/walk_from_keys_integration_test.go b/cmd/mesh-controller/walk_from_keys_integration_test.go
index 3705da9d..a63213ab 100644
--- a/cmd/mesh-controller/walk_from_keys_integration_test.go
+++ b/cmd/mesh-controller/walk_from_keys_integration_test.go
@@ -155,3 +155,32 @@ func TestTheBuilderABuildModuleAndTheControllerAreTakenFromKeysAndNothingIsAsked
 	case <-time.After(300 * time.Millisecond):
 	}
 }
+
+// C5's criterion: after a plan that moves the builder, its record names the builder's key and its fingerprint.
+func TestTheBuildersRecordNamesItsKeyAndFingerprint(t *testing.T) {
+	tm := aTierMesh(t, sdkdelivery.BuilderModule)
+	ctx := t.Context()
+	inv := tm.open.inventory
+	b := aBuilderOnTheBus(t)
+	p := tm.plan(t)
+	p.Commit = "c6c6c6c6c6c6c6c6"
+	p.Modules[sdkdelivery.BuilderModule] = &inventory.PlanModule{}
+	if err := inv.SavePlan(ctx, &p); err != nil {
+		t.Fatal(err)
+	}
+	fp := fpOf('9')
+	manifest := b.indexed(t, sdkdelivery.BuilderModule, "c6", "novox/mesh-catalog", "modules/"+sdkdelivery.BuilderModule, p.Commit, fp)
+	b.built(t, sdkdelivery.BuilderModule, "c6", fp, manifest, sdkdelivery.BuildDone)
+	becomes(t, 10*time.Second, "the builder taken from its key", func() bool {
+		advancePlans(ctx, tm.open)
+		return tm.plan(t).Modules[sdkdelivery.BuilderModule].State == "built"
+	})
+	id := tm.plan(t).Modules[sdkdelivery.BuilderModule].Build
+	record, found, err := inv.BuildByID(ctx, id)
+	if err != nil || !found {
+		t.Fatalf("the builder's record %q: %v %v", id, found, err)
+	}
+	if !strings.HasPrefix(record.ID, "key-") || record.SourceFingerprint != fp || record.Module != sdkdelivery.BuilderModule {
+		t.Fatalf("the builder's record names %+v, not its key and fingerprint %s", record, fp)
+	}
+}