diff --git a/tests/filter_rules.rs b/tests/filter_rules.rs
index 27a28fb..c64de28 100644
--- a/tests/filter_rules.rs
+++ b/tests/filter_rules.rs
@@ -8,6 +8,8 @@ mod helper;
 use crate::helper::pfcli;
 use assert_matches::assert_matches;
 use std::net::Ipv4Addr;
+use std::thread;
+use std::time::Duration;
 
 static ANCHOR_NAME: &'static str = "pfctl-rs.integration.testing.filter-rules";
 
@@ -17,14 +19,17 @@ fn before_each() {
         .try_add_anchor(ANCHOR_NAME, pfctl::AnchorKind::Filter)
         .unwrap();
     pfcli::flush_rules(ANCHOR_NAME, pfcli::FlushOptions::Rules).unwrap();
+    thread::sleep(Duration::from_millis(500));
 }
 
 fn after_each() {
+    thread::sleep(Duration::from_millis(500));
     pfcli::flush_rules(ANCHOR_NAME, pfcli::FlushOptions::Rules).unwrap();
     pfctl::PfCtl::new()
         .unwrap()
         .try_remove_anchor(ANCHOR_NAME, pfctl::AnchorKind::Filter)
         .unwrap();
+    thread::sleep(Duration::from_millis(500));
 }
 
 test!(drop_all_rule {