diff --git a/debian/control b/debian/control
index 44c2adc..18d361a 100644
--- a/debian/control
+++ b/debian/control
@@ -10,7 +10,8 @@ Build-Depends: debhelper (>= 11),
  librust-failure-0.1+default-dev (>= 0.1.5-~~),
  librust-flate2-1+default-dev (>= 1.0.6-~~),
  librust-libc-0.2+default-dev (>= 0.2.48-~~),
- librust-time-0.1+default-dev (>= 0.1.42-~~)
+ librust-time-0.1+default-dev (>= 0.1.42-~~),
+ faketime
 Maintainer: Proxmox Support Team <support@proxmox.com>
 Standards-Version: 4.4.1
 Vcs-Git: git://git.proxmox.com/git/pmg-log-tracker.git
diff --git a/debian/debcargo.toml b/debian/debcargo.toml
index 5ee9490..3a5c8a0 100644
--- a/debian/debcargo.toml
+++ b/debian/debcargo.toml
@@ -7,6 +7,7 @@ section = "admin"
 homepage = "http://www.proxmox.com"
 vcs_git = "git://git.proxmox.com/git/pmg-log-tracker.git"
 vcs_browser = "https://git.proxmox.com/?p=pmg-log-tracker.git;a=summary"
+build_depends = ["faketime"]
 
 [package]
 summary = "Proxmox Mailgateway Log Tracker"
diff --git a/tests/tests_after_queue.rs b/tests/tests_after_queue.rs
index f479325..6918de7 100644
--- a/tests/tests_after_queue.rs
+++ b/tests/tests_after_queue.rs
@@ -6,7 +6,9 @@ mod utils;
 
 #[test]
 fn after_queue_start_end_time_string() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("2020-12-18 15:40:00")
@@ -27,7 +29,9 @@ fn after_queue_start_end_time_string() {
 
 #[test]
 fn after_queue_start_end_timestamp() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608302400")
@@ -48,7 +52,9 @@ fn after_queue_start_end_timestamp() {
 
 #[test]
 fn after_queue_qid() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608302400")
@@ -71,7 +77,9 @@ fn after_queue_qid() {
 
 #[test]
 fn after_queue_host() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608302400")
@@ -94,7 +102,9 @@ fn after_queue_host() {
 
 #[test]
 fn after_queue_search_string() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608302400")
@@ -117,7 +127,9 @@ fn after_queue_search_string() {
 
 #[test]
 fn after_queue_search_string_case_insensitive() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608302400")
diff --git a/tests/tests_before_queue.rs b/tests/tests_before_queue.rs
index 5f36ec2..6089b92 100644
--- a/tests/tests_before_queue.rs
+++ b/tests/tests_before_queue.rs
@@ -5,7 +5,9 @@ mod utils;
 
 #[test]
 fn before_queue_start_end_time_string() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("2020-12-18 15:00:00")
@@ -26,7 +28,9 @@ fn before_queue_start_end_time_string() {
 
 #[test]
 fn before_queue_start_end_timestamp() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608300000")
@@ -47,7 +51,9 @@ fn before_queue_start_end_timestamp() {
 
 #[test]
 fn before_queue_qid() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608300000")
@@ -70,7 +76,9 @@ fn before_queue_qid() {
 
 #[test]
 fn before_queue_host() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608300000")
@@ -93,7 +101,9 @@ fn before_queue_host() {
 
 #[test]
 fn before_queue_search_string() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608300000")
@@ -116,7 +126,9 @@ fn before_queue_search_string() {
 
 #[test]
 fn before_queue_search_string_case_insensitive() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608300000")
@@ -139,7 +151,9 @@ fn before_queue_search_string_case_insensitive() {
 
 #[test]
 fn before_queue_exclude_greylist_ndr() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608300000")
@@ -162,7 +176,9 @@ fn before_queue_exclude_greylist_ndr() {
 
 #[test]
 fn before_queue_to() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608300000")
@@ -185,7 +201,9 @@ fn before_queue_to() {
 
 #[test]
 fn before_queue_mixed_downstream() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-v")
         .arg("-s")
         .arg("1608303600")
@@ -206,7 +224,9 @@ fn before_queue_mixed_downstream() {
 
 #[test]
 fn before_queue_from_to() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1608300000")
@@ -231,7 +251,9 @@ fn before_queue_from_to() {
 
 #[test]
 fn before_queue_mixed_accept_block_quarantine() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1588254000")
@@ -253,7 +275,9 @@ fn before_queue_mixed_accept_block_quarantine() {
 
 #[test]
 fn before_queue_to_search_string() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("1589810100")
@@ -278,7 +302,9 @@ fn before_queue_to_search_string() {
 
 #[test]
 fn before_queue_syntax_reject() {
-    let output = Command::new(utils::log_tracker_path())
+    let output = Command::new("faketime")
+        .arg("2020-12-31 23:59:59")
+        .arg(utils::log_tracker_path())
         .arg("-vv")
         .arg("-s")
         .arg("2020-08-27 14:00:00")