diff --git a/src/analyze/analyze-verify.c b/src/analyze/analyze-verify.c
index ed369532d4..d2f9e5528e 100644
--- a/src/analyze/analyze-verify.c
+++ b/src/analyze/analyze-verify.c
@@ -225,9 +225,10 @@ static int verify_unit(Unit *u, bool check_man) {
 }
 
 int verify_units(char **filenames, UnitFileScope scope, bool check_man, bool run_generators) {
-        const uint8_t flags = MANAGER_TEST_RUN_BASIC |
-                              MANAGER_TEST_RUN_ENV_GENERATORS |
-                              run_generators * MANAGER_TEST_RUN_GENERATORS;
+        const ManagerTestRunFlags flags =
+                MANAGER_TEST_RUN_BASIC |
+                MANAGER_TEST_RUN_ENV_GENERATORS |
+                run_generators * MANAGER_TEST_RUN_GENERATORS;
 
         _cleanup_(manager_freep) Manager *m = NULL;
         Unit *units[strv_length(filenames)];
diff --git a/src/core/cgroup.c b/src/core/cgroup.c
index 7e07b2f13c..6a6766f6fa 100644
--- a/src/core/cgroup.c
+++ b/src/core/cgroup.c
@@ -2305,7 +2305,7 @@ int manager_setup_cgroup(Manager *m) {
 
                 (void) sd_event_source_set_description(m->cgroup_inotify_event_source, "cgroup-inotify");
 
-        } else if (MANAGER_IS_SYSTEM(m) && m->test_run_flags == 0) {
+        } else if (MANAGER_IS_SYSTEM(m) && !MANAGER_IS_TEST_RUN(m)) {
 
                 /* On the legacy hierarchy we only get notifications via cgroup agents. (Which isn't really reliable,
                  * since it does not generate events when control groups with children run empty. */
@@ -2334,11 +2334,11 @@ int manager_setup_cgroup(Manager *m) {
                 if (m->pin_cgroupfs_fd < 0)
                         return log_error_errno(errno, "Failed to open pin file: %m");
 
-        } else if (!m->test_run_flags)
+        } else if (!MANAGER_IS_TEST_RUN(m))
                 return log_error_errno(r, "Failed to create %s control group: %m", scope_path);
 
         /* 7. Always enable hierarchical support if it exists... */
-        if (!all_unified && m->test_run_flags == 0)
+        if (!all_unified && !MANAGER_IS_TEST_RUN(m))
                 (void) cg_set_attribute("memory", "/", "memory.use_hierarchy", "1");
 
         /* 8. Figure out which controllers are supported, and log about it */
diff --git a/src/core/manager.c b/src/core/manager.c
index d9e9dddea3..ba16e8259e 100644
--- a/src/core/manager.c
+++ b/src/core/manager.c
@@ -351,7 +351,7 @@ static int manager_setup_time_change(Manager *m) {
 
         assert(m);
 
-        if (m->test_run_flags)
+        if (MANAGER_IS_TEST_RUN(m))
                 return 0;
 
         m->time_change_event_source = sd_event_source_unref(m->time_change_event_source);
@@ -407,7 +407,7 @@ static int manager_setup_timezone_change(Manager *m) {
 
         assert(m);
 
-        if (m->test_run_flags != 0)
+        if (MANAGER_IS_TEST_RUN(m))
                 return 0;
 
         /* We watch /etc/localtime for three events: change of the link count (which might mean removal from /etc even
@@ -446,7 +446,7 @@ static int enable_special_signals(Manager *m) {
 
         assert(m);
 
-        if (m->test_run_flags)
+        if (MANAGER_IS_TEST_RUN(m))
                 return 0;
 
         /* Enable that we get SIGINT on control-alt-del. In containers
@@ -711,7 +711,7 @@ static int manager_setup_sigchld_event_source(Manager *m) {
         return 0;
 }
 
-int manager_new(UnitFileScope scope, unsigned test_run_flags, Manager **_m) {
+int manager_new(UnitFileScope scope, ManagerTestRunFlags test_run_flags, Manager **_m) {
         _cleanup_(manager_freep) Manager *m = NULL;
         int r;
 
@@ -865,7 +865,7 @@ int manager_new(UnitFileScope scope, unsigned test_run_flags, Manager **_m) {
 static int manager_setup_notify(Manager *m) {
         int r;
 
-        if (m->test_run_flags)
+        if (MANAGER_IS_TEST_RUN(m))
                 return 0;
 
         if (m->notify_fd < 0) {
@@ -944,7 +944,7 @@ static int manager_setup_cgroups_agent(Manager *m) {
          * to it. The system instance hence listens on this special socket, but the user instances listen on the system
          * bus for these messages. */
 
-        if (m->test_run_flags)
+        if (MANAGER_IS_TEST_RUN(m))
                 return 0;
 
         if (!MANAGER_IS_SYSTEM(m))
@@ -1521,7 +1521,7 @@ static bool manager_dbus_is_running(Manager *m, bool deserialized) {
          * and the service unit. If the 'deserialized' parameter is true we'll check the deserialized state of the unit
          * rather than the current one. */
 
-        if (m->test_run_flags != 0)
+        if (MANAGER_IS_TEST_RUN(m))
                 return false;
 
         u = manager_get_unit(m, SPECIAL_DBUS_SOCKET);
@@ -1569,7 +1569,7 @@ static void manager_preset_all(Manager *m) {
         if (!MANAGER_IS_SYSTEM(m))
                 return;
 
-        if (m->test_run_flags != 0)
+        if (MANAGER_IS_TEST_RUN(m))
                 return;
 
         /* If this is the first boot, and we are in the host system, then preset everything */
@@ -1589,7 +1589,7 @@ int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {
         /* If we are running in test mode, we still want to run the generators,
          * but we should not touch the real generator directories. */
         r = lookup_paths_init(&m->lookup_paths, m->unit_file_scope,
-                              m->test_run_flags ? LOOKUP_PATHS_TEMPORARY_GENERATED : 0,
+                              MANAGER_IS_TEST_RUN(m) ? LOOKUP_PATHS_TEMPORARY_GENERATED : 0,
                               NULL);
         if (r < 0)
                 return r;
@@ -3593,7 +3593,7 @@ static void manager_notify_finished(Manager *m) {
         char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX];
         usec_t firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec;
 
-        if (m->test_run_flags)
+        if (MANAGER_IS_TEST_RUN(m))
                 return;
 
         if (MANAGER_IS_SYSTEM(m) && detect_container() <= 0) {
@@ -3788,7 +3788,7 @@ static int manager_run_environment_generators(Manager *m) {
         const char **paths;
         void* args[] = {&tmp, &tmp, &m->environment};
 
-        if (m->test_run_flags && !(m->test_run_flags & MANAGER_TEST_RUN_ENV_GENERATORS))
+        if (MANAGER_IS_TEST_RUN(m) && !(m->test_run_flags & MANAGER_TEST_RUN_ENV_GENERATORS))
                 return 0;
 
         paths = MANAGER_IS_SYSTEM(m) ? system_env_generator_binary_paths : user_env_generator_binary_paths;
@@ -3806,7 +3806,7 @@ static int manager_run_generators(Manager *m) {
 
         assert(m);
 
-        if (m->test_run_flags && !(m->test_run_flags & MANAGER_TEST_RUN_GENERATORS))
+        if (MANAGER_IS_TEST_RUN(m) && !(m->test_run_flags & MANAGER_TEST_RUN_GENERATORS))
                 return 0;
 
         paths = generator_binary_paths(m->unit_file_scope);
@@ -3920,7 +3920,7 @@ static bool manager_journal_is_running(Manager *m) {
 
         assert(m);
 
-        if (m->test_run_flags != 0)
+        if (MANAGER_IS_TEST_RUN(m))
                 return false;
 
         /* If we are the user manager we can safely assume that the journal is up */
diff --git a/src/core/manager.h b/src/core/manager.h
index 13110b3b63..6e6e251a55 100644
--- a/src/core/manager.h
+++ b/src/core/manager.h
@@ -108,14 +108,15 @@ typedef enum ManagerTimestamp {
 #include "show-status.h"
 #include "unit-name.h"
 
-enum {
-        /* 0 = run normally */
+typedef enum ManagerTestRunFlags {
+        MANAGER_TEST_NORMAL             = 0,       /* run normally */
         MANAGER_TEST_RUN_MINIMAL        = 1 << 0,  /* create basic data structures */
         MANAGER_TEST_RUN_BASIC          = 1 << 1,  /* interact with the environment */
         MANAGER_TEST_RUN_ENV_GENERATORS = 1 << 2,  /* also run env generators  */
         MANAGER_TEST_RUN_GENERATORS     = 1 << 3,  /* also run unit generators */
         MANAGER_TEST_FULL = MANAGER_TEST_RUN_BASIC | MANAGER_TEST_RUN_ENV_GENERATORS | MANAGER_TEST_RUN_GENERATORS,
-};
+} ManagerTestRunFlags;
+
 assert_cc((MANAGER_TEST_FULL & UINT8_MAX) == MANAGER_TEST_FULL);
 
 struct Manager {
@@ -299,7 +300,7 @@ struct Manager {
         /* Have we ever changed the "kernel.pid_max" sysctl? */
         bool sysctl_pid_max_changed:1;
 
-        unsigned test_run_flags:8;
+        ManagerTestRunFlags test_run_flags:8;
 
         /* If non-zero, exit with the following value when the systemd
          * process terminate. Useful for containers: systemd-nspawn could get
@@ -410,7 +411,9 @@ struct Manager {
 /* The objective is set to OK as soon as we enter the main loop, and set otherwise as soon as we are done with it */
 #define MANAGER_IS_RUNNING(m) ((m)->objective == MANAGER_OK)
 
-int manager_new(UnitFileScope scope, unsigned test_run_flags, Manager **m);
+#define MANAGER_IS_TEST_RUN(m) ((m)->test_run_flags != 0)
+
+int manager_new(UnitFileScope scope, ManagerTestRunFlags test_run_flags, Manager **m);
 Manager* manager_free(Manager *m);
 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
 
diff --git a/src/core/unit.c b/src/core/unit.c
index 853db527f7..db5dd3e884 100644
--- a/src/core/unit.c
+++ b/src/core/unit.c
@@ -5283,7 +5283,7 @@ void unit_export_state_files(Unit *u) {
         if (!MANAGER_IS_SYSTEM(u->manager))
                 return;
 
-        if (u->manager->test_run_flags != 0)
+        if (MANAGER_IS_TEST_RUN(u->manager))
                 return;
 
         /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data