diff --git a/CHANGELOG.md b/CHANGELOG.md
index 32cb5d76..5860de13 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -49,7 +49,7 @@ When officially released 8.0 will support (mostly) seamless upgrades from the 7.
 - [PR #1420](https://github.com/rqlite/rqlite/pull/1420), [PR #1431](https://github.com/rqlite/rqlite/pull/1431): Nodes join a cluster using the Raft address, not the HTTP API.
 - [PR #1426](https://github.com/rqlite/rqlite/pull/1426): 'go mod' updates, including moving to Raft 1.6.
 - [PR #1430](https://github.com/rqlite/rqlite/pull/1430): Check that any supplied Join addresses are not HTTP servers.
-- [PR #1437](https://github.com/rqlite/rqlite/pull/1437), [PR #1438](https://github.com/rqlite/rqlite/pull/1438): Actually timeout if needed during `nodes/` access. Fixes [issue #1435](https://github.com/rqlite/rqlite/issues/1435). Thanks @dwco-z
+- [PR #1437](https://github.com/rqlite/rqlite/pull/1437), [PR #1438](https://github.com/rqlite/rqlite/pull/1438), [PR #1439](https://github.com/rqlite/rqlite/pull/1439): Actually timeout if needed during `nodes/` access. Fixes [issue #1435](https://github.com/rqlite/rqlite/issues/1435). Thanks @dwco-z
 - [PR #1440](https://github.com/rqlite/rqlite/pull/1440): Add a Compacting WAL rewriter. Thanks @benbjohnson.
 
 ## 7.21.4 (July 8th 2023)
diff --git a/http/nodes.go b/http/nodes.go
index 0be62e5a..6ed8dd9a 100644
--- a/http/nodes.go
+++ b/http/nodes.go
@@ -24,6 +24,8 @@ type Node struct {
 	Leader    bool    `json:"leader"`
 	Time      float64 `json:"time,omitempty"`
 	Error     string  `json:"error,omitempty"`
+
+	mu sync.Mutex
 }
 
 // NewNodeFromServer creates a Node from a Server.
@@ -50,7 +52,7 @@ func (n *Node) Test(ga GetAddresser, leaderAddr string, timeout time.Duration) {
 		defer close(done)
 		apiAddr, err := ga.GetNodeAPIAddr(n.Addr, timeout)
 		if err != nil {
-			n.Error = err.Error()
+			n.SetError(err.Error())
 			return
 		}
 		n.APIAddr = apiAddr
@@ -60,11 +62,30 @@ func (n *Node) Test(ga GetAddresser, leaderAddr string, timeout time.Duration) {
 
 	select {
 	case <-timer.C:
-		n.Error = "timeout"
+		n.SetError("timeout waiting for node to respond")
 	case <-done:
 	}
 }
 
+// SetError sets the Error field of the Node in a synchronized manner.
+func (n *Node) SetError(err string) {
+	n.mu.Lock()
+	defer n.mu.Unlock()
+	n.Error = err
+}
+
+// MarshalJSON implements the json.Marshaler interface.
+func (n *Node) MarshalJSON() ([]byte, error) {
+	n.mu.Lock()
+	defer n.mu.Unlock()
+	type Alias Node
+	return json.Marshal(&struct {
+		*Alias
+	}{
+		Alias: (*Alias)(n),
+	})
+}
+
 type Nodes []*Node
 
 func (n Nodes) Len() int           { return len(n) }
diff --git a/http/nodes_test.go b/http/nodes_test.go
index b5438664..bf6958af 100644
--- a/http/nodes_test.go
+++ b/http/nodes_test.go
@@ -108,7 +108,7 @@ func Test_NodeTestDouble_Timeout(t *testing.T) {
 
 	nodes := Nodes{node1, node2}
 	nodes.Test(mockGA, "leader-raft-addr", 1*time.Second)
-	if !node1.Reachable || !node1.Leader || node2.Reachable || node2.Leader || node2.Error != "timeout" {
+	if !node1.Reachable || !node1.Leader || node2.Reachable || node2.Leader || node2.Error != "timeout waiting for node to respond" {
 		t.Fatalf("Test method did not correctly update node status %s", asJSON(nodes))
 	}