diff --git a/flint/data/tests/SB39400.RACS_0635-31.beam0-MFS-subimage_rms.fits b/flint/data/tests/SB39400.RACS_0635-31.beam0-MFS-subimage_rms.fits
new file mode 100644
index 00000000..adb8c363
Binary files /dev/null and b/flint/data/tests/SB39400.RACS_0635-31.beam0-MFS-subimage_rms.fits differ
diff --git a/tests/test_ms.py b/tests/test_ms.py
new file mode 100644
index 00000000..1ed847e5
--- /dev/null
+++ b/tests/test_ms.py
@@ -0,0 +1,13 @@
+"""Small tests for items related to measurement sets 
+and the MS class
+"""
+from pathlib import Path
+
+from flint.ms import MS
+
+
+def test_ms_self_attribute():
+    ex = Path("example/jack_sparrow.ms")
+    ms = MS(path=ex)
+
+    assert ms.ms.path == ex
diff --git a/tests/test_validation.py b/tests/test_validation.py
new file mode 100644
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--- /dev/null
+++ b/tests/test_validation.py
@@ -0,0 +1,33 @@
+"""Items related to test functions in the validation stage of flint
+"""
+import pytest
+from pathlib import Path
+
+import pkg_resources
+import numpy as np
+
+from flint.validation import RMSImageInfo, get_rms_image_info
+
+
+@pytest.fixture
+def rms_path(tmpdir):
+    rms_path = Path(
+        pkg_resources.resource_filename(
+            "flint", "data/tests/SB39400.RACS_0635-31.beam0-MFS-subimage_rms.fits"
+        )
+    )
+
+    return rms_path
+
+
+def test_rms_image_info(rms_path):
+    rms_info = get_rms_image_info(rms_path=rms_path)
+
+    assert isinstance(rms_info, RMSImageInfo)
+    assert rms_info.path == rms_path
+    assert rms_info.no_valid_pixels == 150
+    assert rms_info.shape == (10, 15)
+    assert np.isclose(0.0001515522, rms_info.median)
+    assert np.isclose(0.00015135764, rms_info.minimum)
+    assert np.isclose(0.0001518184, rms_info.maximum)
+    assert np.isclose(1.1098655e-07, rms_info.std)