diff --git a/src/test/test-execute.c b/src/test/test-execute.c
index f2223e1d3a..7bdb80e89a 100644
--- a/src/test/test-execute.c
+++ b/src/test/test-execute.c
@@ -551,6 +551,7 @@ static int run_tests(UnitFileScope scope, const test_function_t *tests) {
 }
 
 int main(int argc, char *argv[]) {
+        _cleanup_(rm_rf_physical_and_freep) char *runtime_dir = NULL;
         static const test_function_t user_tests[] = {
                 test_exec_bindpaths,
                 test_exec_capabilityambientset,
@@ -611,7 +612,7 @@ int main(int argc, char *argv[]) {
                 return EXIT_TEST_SKIP;
         }
 
-        assert_se(setenv("XDG_RUNTIME_DIR", "/tmp/", 1) == 0);
+        assert_se(runtime_dir = setup_fake_runtime_dir());
         assert_se(set_unit_path(get_testdata_dir("/test-execute")) >= 0);
 
         /* Unset VAR1, VAR2 and VAR3 which are used in the PassEnvironment test
diff --git a/test/test-execute/exec-runtimedirectory-mode.service b/test/test-execute/exec-runtimedirectory-mode.service
index 842721d5c2..480f904155 100644
--- a/test/test-execute/exec-runtimedirectory-mode.service
+++ b/test/test-execute/exec-runtimedirectory-mode.service
@@ -2,7 +2,7 @@
 Description=Test for RuntimeDirectoryMode
 
 [Service]
-ExecStart=/bin/sh -x -c 'mode=$$(stat -c %%a /tmp/test-exec_runtimedirectory-mode); test "$$mode" = "750"'
+ExecStart=/bin/sh -x -c 'mode=$$(stat -c %%a %t/test-exec_runtimedirectory-mode); test "$$mode" = "750"'
 Type=oneshot
 RuntimeDirectory=test-exec_runtimedirectory-mode
 RuntimeDirectoryMode=0750
diff --git a/test/test-execute/exec-runtimedirectory-owner-nfsnobody.service b/test/test-execute/exec-runtimedirectory-owner-nfsnobody.service
index e962af8a4b..1e3b6b4151 100644
--- a/test/test-execute/exec-runtimedirectory-owner-nfsnobody.service
+++ b/test/test-execute/exec-runtimedirectory-owner-nfsnobody.service
@@ -2,7 +2,7 @@
 Description=Test for RuntimeDirectory owner (must not be the default group of the user if Group is set)
 
 [Service]
-ExecStart=/bin/sh -x -c 'group=$$(stat -c %%G /tmp/test-exec_runtimedirectory-owner); test "$$group" = "nfsnobody"'
+ExecStart=/bin/sh -x -c 'group=$$(stat -c %%G %t/test-exec_runtimedirectory-owner); test "$$group" = "nfsnobody"'
 Type=oneshot
 Group=nfsnobody
 User=root
diff --git a/test/test-execute/exec-runtimedirectory-owner.service b/test/test-execute/exec-runtimedirectory-owner.service
index 1f438c182e..54782f9bbd 100644
--- a/test/test-execute/exec-runtimedirectory-owner.service
+++ b/test/test-execute/exec-runtimedirectory-owner.service
@@ -2,7 +2,7 @@
 Description=Test for RuntimeDirectory owner (must not be the default group of the user if Group is set)
 
 [Service]
-ExecStart=/bin/sh -x -c 'group=$$(stat -c %%G /tmp/test-exec_runtimedirectory-owner); test "$$group" = "nobody"'
+ExecStart=/bin/sh -x -c 'group=$$(stat -c %%G %t/test-exec_runtimedirectory-owner); test "$$group" = "nobody"'
 Type=oneshot
 Group=nobody
 User=root
diff --git a/test/test-execute/exec-runtimedirectory.service b/test/test-execute/exec-runtimedirectory.service
index ec46c9d49b..d8f242fde2 100644
--- a/test/test-execute/exec-runtimedirectory.service
+++ b/test/test-execute/exec-runtimedirectory.service
@@ -2,6 +2,6 @@
 Description=Test for RuntimeDirectory
 
 [Service]
-ExecStart=/bin/sh -x -c 'test -d /tmp/test-exec_runtimedirectory'
+ExecStart=/bin/sh -x -c 'test -d %t/test-exec_runtimedirectory'
 Type=oneshot
 RuntimeDirectory=test-exec_runtimedirectory
diff --git a/test/test-execute/exec-temporaryfilesystem-options.service b/test/test-execute/exec-temporaryfilesystem-options.service
index 7b4f48c66a..b7a5baf93a 100644
--- a/test/test-execute/exec-temporaryfilesystem-options.service
+++ b/test/test-execute/exec-temporaryfilesystem-options.service
@@ -9,9 +9,9 @@ Type=oneshot
 TemporaryFileSystem=/var:ro,mode=0700,nostrictatime
 
 # Check /proc/self/mountinfo
-ExecStart=/bin/sh -x -c 'test "$$(awk \'$$5 == "/var" && $$11 !~ /(^|,)ro(,|$)/ { print $$6 }\' /proc/self/mountinfo)" = ""'
-ExecStart=/bin/sh -x -c 'test "$$(awk \'$$5 == "/var" && $$11 !~ /(^|,)mode=700(,|$)/ { print $$6 }\' /proc/self/mountinfo)" = ""'
+ExecStart=/bin/sh -x -c 'test "$$(awk \'$$5 == "/var" && $$11 !~ /(^|,)ro(,|$$)/ { print $$6 }\' /proc/self/mountinfo)" = ""'
+ExecStart=/bin/sh -x -c 'test "$$(awk \'$$5 == "/var" && $$11 !~ /(^|,)mode=700(,|$$)/ { print $$6 }\' /proc/self/mountinfo)" = ""'
 
-ExecStart=/bin/sh -x -c 'test "$$(awk \'$$5 == "/var" && $$6 !~ /(^|,)ro(,|$)/ { print $$6 }\' /proc/self/mountinfo)" = ""'
-ExecStart=/bin/sh -x -c 'test "$$(awk \'$$5 == "/var" && $$6 !~ /(^|,)nodev(,|$)/ { print $$6 }\' /proc/self/mountinfo)" = ""'
-ExecStart=/bin/sh -x -c 'test "$$(awk \'$$5 == "/var" && $$6 ~ /(^|,)strictatime(,|$)/ { print $$6 }\' /proc/self/mountinfo)" = ""'
+ExecStart=/bin/sh -x -c 'test "$$(awk \'$$5 == "/var" && $$6 !~ /(^|,)ro(,|$$)/ { print $$6 }\' /proc/self/mountinfo)" = ""'
+ExecStart=/bin/sh -x -c 'test "$$(awk \'$$5 == "/var" && $$6 !~ /(^|,)nodev(,|$$)/ { print $$6 }\' /proc/self/mountinfo)" = ""'
+ExecStart=/bin/sh -x -c 'test "$$(awk \'$$5 == "/var" && $$6 ~ /(^|,)strictatime(,|$$)/ { print $$6 }\' /proc/self/mountinfo)" = ""'