diff --git a/deploy/deploy-test-server.sh b/deploy/deploy-test-server.sh
index 50b8edc..fbfb99d 100755
--- a/deploy/deploy-test-server.sh
+++ b/deploy/deploy-test-server.sh
@@ -136,6 +136,8 @@ $sudo_cmd chown -R left4me:left4me /opt/left4me
 
 $sudo_cmd cp /opt/left4me/deploy/files/usr/local/lib/systemd/system/left4me-web.service /usr/local/lib/systemd/system/left4me-web.service
 $sudo_cmd cp /opt/left4me/deploy/files/usr/local/lib/systemd/system/left4me-server@.service /usr/local/lib/systemd/system/left4me-server@.service
+$sudo_cmd cp /opt/left4me/deploy/files/usr/local/lib/systemd/system/l4d2-game.slice /usr/local/lib/systemd/system/l4d2-game.slice
+$sudo_cmd cp /opt/left4me/deploy/files/usr/local/lib/systemd/system/l4d2-build.slice /usr/local/lib/systemd/system/l4d2-build.slice
 $sudo_cmd cp /opt/left4me/deploy/files/usr/local/libexec/left4me/left4me-systemctl /usr/local/libexec/left4me/left4me-systemctl
 $sudo_cmd cp /opt/left4me/deploy/files/usr/local/libexec/left4me/left4me-journalctl /usr/local/libexec/left4me/left4me-journalctl
 $sudo_cmd cp /opt/left4me/deploy/files/usr/local/libexec/left4me/left4me-overlay /usr/local/libexec/left4me/left4me-overlay
@@ -154,6 +156,13 @@ $sudo_cmd install -m 0644 -o root -g root \
     /opt/left4me/deploy/files/etc/left4me/sandbox-resolv.conf \
     /etc/left4me/sandbox-resolv.conf
 
+# Host perf-baseline sysctls. Apply with `sysctl --system` so values
+# take effect this deploy, not on next reboot.
+$sudo_cmd install -m 0644 -o root -g root \
+    /opt/left4me/deploy/files/etc/sysctl.d/99-left4me.conf \
+    /etc/sysctl.d/99-left4me.conf
+$sudo_cmd sysctl --system >/dev/null
+
 # Stomp the file every deploy so newly added vars reach existing boxes.
 # SECRET_KEY is derived from /etc/machine-id so it stays stable across
 # redeploys (no session invalidation) without persisting state in /etc.
diff --git a/deploy/tests/test_deploy_artifacts.py b/deploy/tests/test_deploy_artifacts.py
index 53f72a1..5edfaee 100644
--- a/deploy/tests/test_deploy_artifacts.py
+++ b/deploy/tests/test_deploy_artifacts.py
@@ -156,6 +156,20 @@ def test_script_sandbox_in_build_slice_with_oom_adjust():
     assert "-p OOMScoreAdjust=500" in text
 
 
+def test_deploy_script_installs_perf_artifacts():
+    script = DEPLOY_SCRIPT.read_text()
+
+    # Slice files copied into the system-wide systemd unit dir.
+    assert "/usr/local/lib/systemd/system/l4d2-game.slice" in script
+    assert "/usr/local/lib/systemd/system/l4d2-build.slice" in script
+
+    # Sysctl drop-in installed under /etc/sysctl.d/.
+    assert "/etc/sysctl.d/99-left4me.conf" in script
+
+    # Values applied immediately, not on next boot.
+    assert "sysctl --system" in script
+
+
 def _fake_command(tmp_path, command_name):
     marker = tmp_path / f"{command_name}.args"
     command = tmp_path / command_name