diff --git a/src/config.rs b/src/config.rs
index f7fa32d..4851750 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -3,7 +3,7 @@ mod file_config;
 mod filters;
 
 use crate::BoxedError;
-use clap::{arg, value_parser, Command};
+use clap::{arg, value_parser, ArgAction, Command};
 use file_config::FileConfig;
 use std::{path::PathBuf, time::Duration};
 
@@ -17,6 +17,7 @@ pub struct Config {
     pub poll_time_window: Duration,
     pub idle_bucket_name: String,
     pub active_window_bucket_name: String,
+    pub mock_server: bool,
     filters: Vec<Filter>,
 }
 
@@ -42,6 +43,9 @@ impl Config {
                 arg!(--"poll-time-window" <SECONDS> "Period between sending heartbeats to the server for idle activity")
                     .value_parser(value_parser!(u32))
                     .default_value(defaults::poll_time_window_seconds().to_string()),
+                arg!(--"mock-server" "Don't communicate to the ActivityWatch server")
+                    .value_parser(value_parser!(bool))
+                    .action(ArgAction::SetTrue),
             ])
             .get_matches();
 
@@ -60,6 +64,7 @@ impl Config {
             idle_bucket_name,
             active_window_bucket_name,
             filters: config.client.filters,
+            mock_server: *matches.get_one("mock-server").unwrap(),
         })
     }
 
diff --git a/src/main.rs b/src/main.rs
index 74e31f5..bde1328 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -106,10 +106,17 @@ fn main() -> Result<(), BoxedError> {
     let client = ReportClient::new(Config::from_cli()?)?;
     let client = Arc::new(client);
 
-    info!(
-        "Sending to server {}:{}",
-        client.config.host, client.config.port
-    );
+    if client.config.mock_server {
+        warn!(
+            "Not sending to server {}:{}",
+            client.config.host, client.config.port
+        );
+    } else {
+        info!(
+            "Sending to server {}:{}",
+            client.config.host, client.config.port
+        );
+    }
     info!(
         "Idle timeout: {} seconds",
         client.config.idle_timeout.as_secs()
diff --git a/src/report_client.rs b/src/report_client.rs
index 72dcfeb..0aaf369 100644
--- a/src/report_client.rs
+++ b/src/report_client.rs
@@ -14,8 +14,11 @@ pub struct ReportClient {
 impl ReportClient {
     pub fn new(config: Config) -> Result<Self, BoxedError> {
         let client = AwClient::new(&config.host, &config.port.to_string(), "awatcher");
-        Self::create_bucket(&client, &config.idle_bucket_name, "afkstatus")?;
-        Self::create_bucket(&client, &config.active_window_bucket_name, "currentwindow")?;
+
+        if !config.mock_server {
+            Self::create_bucket(&client, &config.idle_bucket_name, "afkstatus")?;
+            Self::create_bucket(&client, &config.active_window_bucket_name, "currentwindow")?;
+        }
 
         Ok(Self { client, config })
     }
@@ -39,12 +42,14 @@ impl ReportClient {
             data,
         };
 
+        if self.config.mock_server {
+            return Ok(());
+        }
+
         let pulsetime = (self.config.idle_timeout + self.config.poll_time_idle).as_secs_f64();
         self.client
             .heartbeat(&self.config.idle_bucket_name, &event, pulsetime)
-            .map_err(|_| "Failed to send heartbeat")?;
-
-        Ok(())
+            .map_err(|_| "Failed to send heartbeat".into())
     }
 
     pub fn send_active_window(&self, app_id: &str, title: &str) -> Result<(), BoxedError> {
@@ -73,6 +78,10 @@ impl ReportClient {
             data,
         };
 
+        if self.config.mock_server {
+            return Ok(());
+        }
+
         let interval_margin = self.config.poll_time_idle.as_secs_f64() + 1.0;
         self.client
             .heartbeat(