diff --git a/src/pytestsysstats/plugin.py b/src/pytestsysstats/plugin.py
index 4009858..20cbeee 100644
--- a/src/pytestsysstats/plugin.py
+++ b/src/pytestsysstats/plugin.py
@@ -93,6 +93,9 @@ def __attrs_post_init__(self) -> None:
             if platform.is_freebsd():
                 # FreeBSD doesn't apparently support uss
                 self.sys_stats_mem_type = "rss"
+            if platform.is_sunos():
+                # Solaris and illumos doesn't apparently support uss
+                self.sys_stats_mem_type = "rss"
         else:
             self.sys_stats_mem_type = "rss"
 
diff --git a/tests/functional/test_syststats.py b/tests/functional/test_syststats.py
index 9c6ef31..4168cad 100644
--- a/tests/functional/test_syststats.py
+++ b/tests/functional/test_syststats.py
@@ -96,6 +96,7 @@ def test_one():
 
 
 @pytest.mark.skip_on_freebsd
+@pytest.mark.skip_on_sunos
 def test_basic_sys_stats_uss(pytester):
     pytester.makepyfile(
         """