diff --git a/packages/base/src/experiment-manager.ts b/packages/base/src/experiment-manager.ts
index f20491dd8..7a9893091 100644
--- a/packages/base/src/experiment-manager.ts
+++ b/packages/base/src/experiment-manager.ts
@@ -121,6 +121,17 @@ export class ExperimentManager {
         return undefined;
     }
 
+    /**
+     * Close the given experiment from the server
+     * @param experimentUUID experiment UUID
+     */
+    async closeExperiment(experimentUUID: string): Promise<void> {
+        const experimentToDelete = this.fOpenExperiments.get(experimentUUID);
+        if (experimentToDelete) {
+            await this.fTspClient.closeExperiment(experimentUUID);
+        }
+    }
+
     /**
      * Delete the given experiment from the server
      * @param experimentUUID experiment UUID
diff --git a/theia-extensions/viewer-prototype/src/browser/theia-rpc-tsp-proxy.ts b/theia-extensions/viewer-prototype/src/browser/theia-rpc-tsp-proxy.ts
index 50a3d00d2..e5f576108 100644
--- a/theia-extensions/viewer-prototype/src/browser/theia-rpc-tsp-proxy.ts
+++ b/theia-extensions/viewer-prototype/src/browser/theia-rpc-tsp-proxy.ts
@@ -112,6 +112,15 @@ export class TheiaRpcTspProxy implements ITspClient {
         return this.toTspClientResponse<Experiment>(await this.tspClient.updateExperiment(expUUID, parameters));
     }
 
+    /**
+     * Close an experiment
+     * @param expUUID Experiment UUID to close
+     * @returns The closed experiment
+     */
+    public async closeExperiment(expUUID: string): Promise<TspClientResponse<Experiment>> {
+        return this.toTspClientResponse<Experiment>(await this.tspClient.closeExperiment(expUUID));
+    }
+
     /**
      * Delete an experiment on the server
      * @param expUUID Experiment UUID to delete
diff --git a/theia-extensions/viewer-prototype/src/browser/trace-explorer/trace-explorer-sub-widgets/theia-trace-explorer-opened-traces-widget.tsx b/theia-extensions/viewer-prototype/src/browser/trace-explorer/trace-explorer-sub-widgets/theia-trace-explorer-opened-traces-widget.tsx
index 90e854555..2bee26b37 100644
--- a/theia-extensions/viewer-prototype/src/browser/trace-explorer/trace-explorer-sub-widgets/theia-trace-explorer-opened-traces-widget.tsx
+++ b/theia-extensions/viewer-prototype/src/browser/trace-explorer/trace-explorer-sub-widgets/theia-trace-explorer-opened-traces-widget.tsx
@@ -67,11 +67,12 @@ export class TraceExplorerOpenedTracesWidget extends ReactWidget {
 
     public closeExperiment(traceUUID: string): void {
         signalManager().fireCloseTraceViewerTabSignal(traceUUID);
+        this._experimentManager.closeExperiment(traceUUID);
     }
 
     public deleteExperiment(traceUUID: string): void {
-        this._experimentManager.deleteExperiment(traceUUID);
         this.closeExperiment(traceUUID);
+        this._experimentManager.deleteExperiment(traceUUID);
     }
 
     render(): React.ReactNode {
diff --git a/theia-extensions/viewer-prototype/src/browser/trace-viewer/trace-viewer.tsx b/theia-extensions/viewer-prototype/src/browser/trace-viewer/trace-viewer.tsx
index 416ebcf59..685159a09 100644
--- a/theia-extensions/viewer-prototype/src/browser/trace-viewer/trace-viewer.tsx
+++ b/theia-extensions/viewer-prototype/src/browser/trace-viewer/trace-viewer.tsx
@@ -349,6 +349,7 @@ export class TraceViewerWidget extends ReactWidget implements StatefulWidget {
         super.onCloseRequest(msg);
         if (this.openedExperiment) {
             signalManager().fireExperimentClosedSignal(this.openedExperiment);
+            this.experimentManager.closeExperiment(this.openedExperiment.UUID);
         }
     }