diff --git a/src/test/meson.build b/src/test/meson.build
index ef741388d5..877005e82f 100644
--- a/src/test/meson.build
+++ b/src/test/meson.build
@@ -14,6 +14,7 @@ test_env = environment()
 test_env.set('SYSTEMD_LANGUAGE_FALLBACK_MAP', language_fallback_map)
 test_env.set('PATH', project_build_root + ':' + path)
 test_env.set('PROJECT_BUILD_ROOT', project_build_root)
+test_env.set('SYSTEMD_SLOW_TESTS', slow_tests ? '1' : '0')
 
 if efi_addon != ''
         test_env.set('EFI_ADDON', efi_addon)
diff --git a/src/test/test-nss-hosts.c b/src/test/test-nss-hosts.c
index 7758f0adc9..72a9c6454c 100644
--- a/src/test/test-nss-hosts.c
+++ b/src/test/test-nss-hosts.c
@@ -451,7 +451,11 @@ static int parse_argv(int argc, char **argv,
         } else {
                 _cleanup_free_ char *hostname = NULL;
                 assert_se(hostname = gethostname_malloc());
-                assert_se(names = strv_new("localhost", "_gateway", "_outbound", "foo_no_such_host", hostname));
+                assert_se(names = strv_new("localhost",
+                                           "_gateway",
+                                           "_outbound",
+                                           hostname,
+                                           slow_tests_enabled() ? "foo_no_such_host" : NULL));
 
                 n = make_addresses(&addrs);
                 assert_se(n >= 0);
diff --git a/src/ukify/test/test_ukify.py b/src/ukify/test/test_ukify.py
index f50e88d2f4..ec466393d3 100755
--- a/src/ukify/test/test_ukify.py
+++ b/src/ukify/test/test_ukify.py
@@ -36,6 +36,11 @@ sys.path.append(os.path.dirname(__file__) + '/..')
 import ukify
 
 build_root = os.getenv('PROJECT_BUILD_ROOT')
+try:
+    slow_tests = bool(int(os.getenv('SYSTEMD_SLOW_TESTS', '1')))
+except ValueError:
+    slow_tests = True
+
 arg_tools = ['--tools', build_root] if build_root else []
 
 def systemd_measure():
@@ -531,6 +536,7 @@ def test_uname_scraping(kernel_initrd):
     uname = ukify.Uname.scrape(kernel_initrd[1])
     assert re.match(r'\d+\.\d+\.\d+', uname)
 
+@pytest.mark.skipif(not slow_tests, reason='slow')
 @pytest.mark.parametrize("days", [365*10, None])
 def test_efi_signing_sbsign(days, kernel_initrd, tmp_path):
     if kernel_initrd is None:
@@ -576,6 +582,7 @@ def test_efi_signing_sbsign(days, kernel_initrd, tmp_path):
 
     shutil.rmtree(tmp_path)
 
+@pytest.mark.skipif(not slow_tests, reason='slow')
 def test_efi_signing_pesign(kernel_initrd, tmp_path):
     if kernel_initrd is None:
         pytest.skip('linux+initrd not found')
@@ -635,16 +642,22 @@ def test_inspect(kernel_initrd, tmp_path, capsys):
     uname_arg='1.2.3'
     osrel_arg='Linux'
     cmdline_arg='ARG1 ARG2 ARG3'
-    opts = ukify.parse_args([
+
+    args = [
         'build',
         *kernel_initrd,
         f'--cmdline={cmdline_arg}',
         f'--os-release={osrel_arg}',
         f'--uname={uname_arg}',
         f'--output={output}',
-        f'--secureboot-certificate={cert.name}',
-        f'--secureboot-private-key={key.name}',
-    ])
+    ]
+    if slow_tests:
+        args += [
+            f'--secureboot-certificate={cert.name}',
+            f'--secureboot-private-key={key.name}',
+        ]
+
+    opts = ukify.parse_args(args)
 
     ukify.check_inputs(opts)
     ukify.make_uki(opts)
@@ -668,6 +681,7 @@ def test_inspect(kernel_initrd, tmp_path, capsys):
 
     shutil.rmtree(tmp_path)
 
+@pytest.mark.skipif(not slow_tests, reason='slow')
 def test_pcr_signing(kernel_initrd, tmp_path):
     if kernel_initrd is None:
         pytest.skip('linux+initrd not found')
@@ -734,6 +748,7 @@ def test_pcr_signing(kernel_initrd, tmp_path):
 
     shutil.rmtree(tmp_path)
 
+@pytest.mark.skipif(not slow_tests, reason='slow')
 def test_pcr_signing2(kernel_initrd, tmp_path):
     if kernel_initrd is None:
         pytest.skip('linux+initrd not found')