diff --git a/modules/mesh-delivery-assigner/cmd/mesh-delivery-assigner/integration_test.go b/modules/mesh-delivery-assigner/cmd/mesh-delivery-assigner/integration_test.go
index 9ab48e5..40c299f 100644
--- a/modules/mesh-delivery-assigner/cmd/mesh-delivery-assigner/integration_test.go
+++ b/modules/mesh-delivery-assigner/cmd/mesh-delivery-assigner/integration_test.go
@@ -281,9 +281,11 @@ func (b *bed) get(t *testing.T, bucket, key string) []byte {
 	return nil
 }
 
-// 1297/B4 on the bus, 1906/D5: the controller sends ace and g14 builds while the canary ace does not run F healthy yet.
-// Started whole, the assigner wants F on the canary, holds g14 back with no want, and writes no difference at all: there
-// is no send to compare with (ADR 0539 §8).
+// 1297/B4 on the bus, 1906/D5: the controller sends ace, g14 and shanks builds while the canary ace does not run F healthy yet.
+// Started whole, the assigner wants F on the canary and writes no difference at all: there is no send to compare with (ADR 0539
+// §8). 1945/AC19, AC21: shanks, which runs the module with no want, gets its first want past the canary rule; g14, which does not
+// run it, is held back with no want, so web is on neither list there and the assigner raises the condition naming g14, web and
+// the canary rule.
 func TestWantsAreWrittenAndNoDifferenceIs(t *testing.T) {
 	b := startBed(t, "")
 	fNew, fOld := delivery.SourcePrefix2+strings.Repeat("b", 64), delivery.SourcePrefix2+strings.Repeat("a", 64)
@@ -299,16 +301,16 @@ func TestWantsAreWrittenAndNoDifferenceIs(t *testing.T) {
 	gkey, _ := delivery.ControllerGrantKey("web", fNew)
 	grant, _ := delivery.EncodeControllerGrant(delivery.ControllerGrant{})
 	b.putJSON(t, delivery.ControllerGrantsBucket, gkey, grant)
-	b.compose(t, "ace", "web", fNew, 'c', delivery.JudgedNeither)
-	b.compose(t, "g14", "web", fNew, 'c', delivery.JudgedNeither)
-	for _, node := range []string{"ace", "g14"} {
+	for _, node := range []string{"ace", "g14", "shanks"} {
+		b.compose(t, node, "web", fNew, 'c', delivery.JudgedNeither)
 		on, _ := delivery.EncodePresence(delivery.Presence{Online: true})
 		b.putJSON(t, delivery.PresenceBucket, node, on)
-		have, _ := delivery.EncodeHave(delivery.Have{FP: fOld, Phase: delivery.PhaseRunning, Health: delivery.HealthOK})
-		b.putJSON(t, delivery.HaveBucket, node+".web", have)
+		if node != "g14" {
+			have, _ := delivery.EncodeHave(delivery.Have{FP: fOld, Phase: delivery.PhaseRunning, Health: delivery.HealthOK})
+			b.putJSON(t, delivery.HaveBucket, node+".web", have)
+		}
+		b.putJSON(t, provider.AssignmentsBucket, node+".web", []byte(`{"node":"`+node+`","module":"web","build":"b-`+node+`"}`))
 	}
-	b.putJSON(t, provider.AssignmentsBucket, "ace.web", []byte(`{"node":"ace","module":"web","build":"b-8"}`))
-	b.putJSON(t, provider.AssignmentsBucket, "g14.web", []byte(`{"node":"g14","module":"web","build":"b-9"}`))
 	b.start(t)
 
 	wkey, _ := delivery.WantKey("ace", "web")
@@ -316,12 +318,25 @@ func TestWantsAreWrittenAndNoDifferenceIs(t *testing.T) {
 	if err != nil || want.FP != fNew {
 		t.Fatalf("the canary ace's want = %+v, %v", want, err)
 	}
-	time.Sleep(500 * time.Millisecond)
+	if w := b.wantNow(t, "shanks", "web", "shanks' first want past the canary rule", func(w delivery.Want) bool { return w.FP == fNew }); w.Composed != "sha256:"+strings.Repeat("c", 64) {
+		t.Errorf("shanks' want = %+v, want F naming its composition", w)
+	}
+	var neither asks.Condition
+	for deadline := time.Now().Add(10 * time.Second); time.Now().Before(deadline) && neither.Key == ""; time.Sleep(100 * time.Millisecond) {
+		for k, c := range b.conditionsSaid(t) {
+			if strings.Contains(k, ".neither.") && c.State == asks.StateRaised {
+				neither = c
+			}
+		}
+	}
+	if neither.Subject.Machine != "g14" || neither.Subject.ID != "web" || neither.Severity != asks.SeverityUrgent || !strings.Contains(neither.Explanation, "canary") {
+		t.Errorf("the condition of web on neither list on g14 = %+v", neither)
+	}
 	if keys, err := b.buckets[delivery.AssignerDifferencesBucket].Keys(b.ctx); err == nil && len(keys) != 0 {
 		t.Errorf("differences were written: %v", keys)
 	}
 	if e, err := b.buckets[delivery.AssignerWantsBucket].Get(b.ctx, "want.g14.web"); err == nil {
-		t.Errorf("g14, held back by the canary with no want before, was given one: %s", e.Value())
+		t.Errorf("g14, which does not run web and is held back by the canary, was given a want: %s", e.Value())
 	}
 }
 
@@ -415,7 +430,7 @@ func TestAFailedDataModuleIsAskedToRestore(t *testing.T) {
 	key := ""
 	for deadline := time.Now().Add(10 * time.Second); time.Now().Before(deadline) && key == ""; time.Sleep(100 * time.Millisecond) {
 		for k, c := range b.conditionsSaid(t) {
-			if c.State == asks.StateRaised && c.Subject.ID == "mail" {
+			if c.State == asks.StateRaised && c.Subject.ID == "mail" && strings.Contains(k, ".held.") {
 				if c.Subject.Machine != "ace" || !strings.Contains(c.Explanation, "connection refused") {
 					t.Fatalf("the condition = %+v, want it to name ace and the check's words", c)
 				}
@@ -634,8 +649,8 @@ func TestAReleaseAnswerWritesTheWantAgain(t *testing.T) {
 	}
 	for deadline := time.Now().Add(10 * time.Second); time.Now().Before(deadline); time.Sleep(100 * time.Millisecond) {
 		cleared := false
-		for _, c := range b.conditionsSaid(t) {
-			cleared = cleared || (c.Subject.ID == "web" && c.State == asks.StateCleared)
+		for k, c := range b.conditionsSaid(t) {
+			cleared = cleared || (c.Subject.ID == "web" && c.State == asks.StateCleared && strings.Contains(k, ".held."))
 		}
 		if cleared {
 			return
@@ -805,8 +820,8 @@ func TestAHoldIsLiftedOnceEveryNodeRunsItHealthy(t *testing.T) {
 		if b.hasKey(delivery.AssignerWantsBucket, hkey) || b.hasKey(delivery.AssignerAsksBucket, akey) {
 			continue
 		}
-		for _, c := range b.conditionsSaid(t) {
-			if c.Subject.ID == "web" && c.State == asks.StateCleared && strings.Contains(c.Resolved, "lifted its hold by itself") {
+		for k, c := range b.conditionsSaid(t) {
+			if c.Subject.ID == "web" && c.State == asks.StateCleared && strings.Contains(k, ".held.") && strings.Contains(c.Resolved, "lifted its hold by itself") {
 				if w := b.wantNow(t, "ace", "web", "the want at the lifted fingerprint", func(w delivery.Want) bool { return w.FP == fNew }); w.Rule != 0 {
 					t.Errorf("the want = %+v", w)
 				}