diff --git a/testing/hosts/default/etc/ssh/sshd_config b/testing/hosts/default/etc/ssh/sshd_config
index bed9e8238..622887f04 100644
--- a/testing/hosts/default/etc/ssh/sshd_config
+++ b/testing/hosts/default/etc/ssh/sshd_config
@@ -13,4 +13,5 @@ PrintLastLog no
 UsePAM no
 AcceptEnv LANG LC_*
 AcceptEnv LEAK_DETECTIVE_LOG
+SetEnv LEAK_DETECTIVE_IGNORE_UNKNOWN=1
 Subsystem	sftp	/usr/lib/openssh/sftp-server
diff --git a/testing/hosts/default/etc/systemd/system.conf.d/99-ignore-unknown-memory.conf b/testing/hosts/default/etc/systemd/system.conf.d/99-ignore-unknown-memory.conf
new file mode 100644
index 000000000..acf2eee6d
--- /dev/null
+++ b/testing/hosts/default/etc/systemd/system.conf.d/99-ignore-unknown-memory.conf
@@ -0,0 +1,2 @@
+[Manager]
+DefaultEnvironment=LEAK_DETECTIVE_IGNORE_UNKNOWN=1