diff --git a/devtools/client/aboutdebugging/src/modules/client-wrapper.js b/devtools/client/aboutdebugging/src/modules/client-wrapper.js
index 838ae9b55cd2..53c317587128 100644
--- a/devtools/client/aboutdebugging/src/modules/client-wrapper.js
+++ b/devtools/client/aboutdebugging/src/modules/client-wrapper.js
@@ -166,7 +166,7 @@ class ClientWrapper {
   }
 
   isClosed() {
-    return this.client._closed;
+    return this.client._transportClosed;
   }
 
   // This method will be mocked to return a dummy URL during mochitests
diff --git a/devtools/client/devtools-client.js b/devtools/client/devtools-client.js
index 61f12bbee8c9..dbc6e5ace6ff 100644
--- a/devtools/client/devtools-client.js
+++ b/devtools/client/devtools-client.js
@@ -113,7 +113,7 @@ DevToolsClient.prototype = {
    *         Resolves after the underlying transport is closed.
    */
   close() {
-    if (this._closed) {
+    if (this._transportClosed) {
       return Promise.resolve();
     }
     if (this._closePromise) {
@@ -213,7 +213,7 @@ DevToolsClient.prototype = {
       return onResponse(response) || response;
     };
 
-    if (this._closed) {
+    if (this._transportClosed) {
       const msg =
         "'" +
         type +
@@ -589,10 +589,10 @@ DevToolsClient.prototype = {
    *        the stream.
    */
   onTransportClosed() {
-    if (this._closed) {
+    if (this._transportClosed) {
       return;
     }
-    this._closed = true;
+    this._transportClosed = true;
     this.emit("closed");
 
     this.purgeRequests();
diff --git a/devtools/client/framework/test/browser_toolbox_remoteness_change.js b/devtools/client/framework/test/browser_toolbox_remoteness_change.js
index 15684815e4bc..b7466d636bfc 100644
--- a/devtools/client/framework/test/browser_toolbox_remoteness_change.js
+++ b/devtools/client/framework/test/browser_toolbox_remoteness_change.js
@@ -48,5 +48,5 @@ add_task(async function() {
 
   const { client } = toolbox.target;
   await toolbox.destroy();
-  ok(client._closed, "The client is closed after closing the toolbox");
+  ok(client._transportClosed, "The client is closed after closing the toolbox");
 });
diff --git a/devtools/client/shared/remote-debugging/remote-client-manager.js b/devtools/client/shared/remote-debugging/remote-client-manager.js
index d441137fba70..db5ae34d0706 100644
--- a/devtools/client/shared/remote-debugging/remote-client-manager.js
+++ b/devtools/client/shared/remote-debugging/remote-client-manager.js
@@ -131,7 +131,7 @@ class RemoteClientManager {
    */
   _onClientClosed() {
     const closedClientKeys = [...this._clients.keys()].filter(key => {
-      return this._clients.get(key)._closed;
+      return this._clients.get(key)._transportClosed;
     });
 
     for (const key of closedClientKeys) {