diff --git a/node/cmd/guardiand/node.go b/node/cmd/guardiand/node.go
index d73be17f5..8a6560ff4 100644
--- a/node/cmd/guardiand/node.go
+++ b/node/cmd/guardiand/node.go
@@ -62,6 +62,15 @@ import (
 	googleapi_option "google.golang.org/api/option"
 )
 
+const (
+	inboundObservationBufferSize         = 50
+	inboundSignedVaaBufferSize           = 50
+	observationRequestOutboundBufferSize = 50
+	observationRequestInboundBufferSize  = 50
+	// observationRequestBufferSize is the buffer size of the per-network reobservation channel
+	observationRequestBufferSize = 25
+)
+
 var (
 	p2pNetworkID *string
 	p2pPort      *uint
@@ -403,9 +412,6 @@ var NodeCmd = &cobra.Command{
 // guardians to reduce risk from a compromised builder.
 var Build = "prod"
 
-// observationRequestBufferSize is the buffer size of the per-network reobservation channel
-const observationRequestBufferSize = 25
-
 func runNode(cmd *cobra.Command, args []string) {
 	if Build == "dev" && !*unsafeDevMode {
 		fmt.Println("This is a development build. --unsafeDevMode must be enabled.")
@@ -907,13 +913,13 @@ func runNode(cmd *cobra.Command, args []string) {
 	setReadC, setWriteC := makeChannelPair[*common.GuardianSet](0)
 
 	// Inbound signed VAAs
-	signedInReadC, signedInWriteC := makeChannelPair[*gossipv1.SignedVAAWithQuorum](50)
+	signedInReadC, signedInWriteC := makeChannelPair[*gossipv1.SignedVAAWithQuorum](inboundSignedVaaBufferSize)
 
 	// Inbound observation requests from the p2p service (for all chains)
-	obsvReqReadC, obsvReqWriteC := makeChannelPair[*gossipv1.ObservationRequest](common.ObsvReqChannelSize)
+	obsvReqReadC, obsvReqWriteC := makeChannelPair[*gossipv1.ObservationRequest](observationRequestInboundBufferSize)
 
 	// Outbound observation requests
-	obsvReqSendReadC, obsvReqSendWriteC := makeChannelPair[*gossipv1.ObservationRequest](common.ObsvReqChannelSize)
+	obsvReqSendReadC, obsvReqSendWriteC := makeChannelPair[*gossipv1.ObservationRequest](observationRequestOutboundBufferSize)
 
 	// Injected VAAs (manually generated rather than created via observation)
 	injectReadC, injectWriteC := makeChannelPair[*vaa.VAA](0)
diff --git a/node/pkg/common/obsvReqSendC.go b/node/pkg/common/obsvReqSendC.go
index 298193695..d0bd45ef0 100644
--- a/node/pkg/common/obsvReqSendC.go
+++ b/node/pkg/common/obsvReqSendC.go
@@ -6,8 +6,6 @@ import (
 	gossipv1 "github.com/certusone/wormhole/node/pkg/proto/gossip/v1"
 )
 
-const ObsvReqChannelSize = 50
-
 var ErrChanFull = errors.New("channel is full")
 
 func PostObservationRequest(obsvReqSendC chan<- *gossipv1.ObservationRequest, req *gossipv1.ObservationRequest) error {
diff --git a/node/pkg/common/obsvReqSendC_test.go b/node/pkg/common/obsvReqSendC_test.go
index da0329dc5..e6dad6964 100644
--- a/node/pkg/common/obsvReqSendC_test.go
+++ b/node/pkg/common/obsvReqSendC_test.go
@@ -11,6 +11,8 @@ import (
 )
 
 func TestObsvReqSendLimitEnforced(t *testing.T) {
+	const ObsvReqChannelSize = 50
+
 	obsvReqSendC := make(chan *gossipv1.ObservationRequest, ObsvReqChannelSize)
 
 	// If the channel overflows, the write hangs, so use a go routine with a timeout.