diff --git a/src/libsystemd/sd-device/test-sd-device-thread.c b/src/libsystemd/sd-device/test-sd-device-thread.c
index 763e98c114..644f3c2aee 100644
--- a/src/libsystemd/sd-device/test-sd-device-thread.c
+++ b/src/libsystemd/sd-device/test-sd-device-thread.c
@@ -30,8 +30,6 @@ int main(int argc, char *argv[]) {
         const char *key, *value;
         int r;
 
-        unsetenv("SYSTEMD_MEMPOOL");
-
         r = sd_device_new_from_syspath(&loopback, "/sys/class/net/lo");
         if (r < 0)
                 return handle_error_errno(r, "Failed to create loopback device object");
diff --git a/src/libudev/test-udev-device-thread.c b/src/libudev/test-udev-device-thread.c
index 3f0341a698..c082fdca46 100644
--- a/src/libudev/test-udev-device-thread.c
+++ b/src/libudev/test-udev-device-thread.c
@@ -28,8 +28,6 @@ int main(int argc, char *argv[]) {
         pthread_t t;
         int r;
 
-        unsetenv("SYSTEMD_MEMPOOL");
-
         loopback = udev_device_new_from_syspath(NULL, "/sys/class/net/lo");
         if (!loopback)
                 return handle_error_errno(errno, "Failed to create loopback device object");