--- a
+++ b/tests/diffexp/test_DEResults.py
@@ -0,0 +1,27 @@
+import unittest
+
+import pandas as pd
+
+from inmoose.diffexp import DEResults
+
+
+class Test(unittest.TestCase):
+    def test_DEResults(self):
+        df = pd.DataFrame()
+        with self.assertRaisesRegex(
+            ValueError, "log2FoldChange missing from results table"
+        ):
+            res = DEResults(df)
+
+        df["log2FoldChange"] = [1, 2, 3]
+        with self.assertRaisesRegex(ValueError, "lfcSE missing from results table"):
+            res = DEResults(df)
+
+        df["lfcSE"] = [0.1, 0.2, 0.3]
+        with self.assertRaisesRegex(ValueError, "pvalue missing from results table"):
+            res = DEResults(df)
+
+        df["pvalue"] = [0.01, 0.02, 0.03]
+        res = DEResults(df)
+
+        _subres = res.loc[:1, :]