diff --git a/validphys2/src/validphys/tests/conftest.py b/validphys2/src/validphys/tests/conftest.py
index 5eec1717b4..d967b44499 100644
--- a/validphys2/src/validphys/tests/conftest.py
+++ b/validphys2/src/validphys/tests/conftest.py
@@ -4,6 +4,7 @@
 Pytest fixtures.
 """
 import pathlib
+import sys
 
 import pytest
 from hypothesis import settings
@@ -84,3 +85,15 @@ def weighted_data_witht0_config(data_witht0_config):
     config_dict = dict(data_witht0_config)
     config_dict.update({'experiments': WEIGHTED_DATA})
     return config_dict
+
+def pytest_runtest_setup(item):
+    ALL = {"darwin", "linux"}
+    supported_platforms = ALL.intersection(mark.name for mark in item.iter_markers())
+    plat = sys.platform
+    if supported_platforms and plat not in supported_platforms:
+        pytest.skip("cannot run on platform {}".format(plat))
+
+def pytest_configure(config):
+    config.addinivalue_line(
+        "markers", "linux: mark test to run only on linux"
+    )
\ No newline at end of file
diff --git a/validphys2/src/validphys/tests/test_plots.py b/validphys2/src/validphys/tests/test_plots.py
index a3cb2c0429..99c80e60e0 100644
--- a/validphys2/src/validphys/tests/test_plots.py
+++ b/validphys2/src/validphys/tests/test_plots.py
@@ -6,6 +6,7 @@
 
 from validphys.api import API
 
+@pytest.mark.linux
 @pytest.mark.mpl_image_compare
 def test_plotpdfs():
     pdfs = ['NNPDF31_nnlo_as_0118']
@@ -14,6 +15,7 @@ def test_plotpdfs():
     #plot_pdfs returns a generator with (figure, name_hint)
     return next(API.plot_pdfs(pdfs=pdfs, Q=Q, flavours=flavours))[0]
 
+@pytest.mark.linux
 @pytest.mark.mpl_image_compare
 def test_dataspecschi2():
     experiments = [
@@ -34,6 +36,7 @@ def test_dataspecschi2():
     return API.plot_dataspecs_datasets_chi2(
         experiments=experiments, dataspecs=dataspecs, use_cuts='nocuts')
 
+@pytest.mark.linux
 @pytest.mark.mpl_image_compare
 def test_plot_xq2():
     theoryid = 53