diff --git a/workflow/tests/test_trim_reads.py b/workflow/tests/test_trim_reads.py
new file mode 100644
index 0000000000000000000000000000000000000000..cd15430655a563182808fa9f9155cb2a7bbf8ae1
--- /dev/null
+++ b/workflow/tests/test_trim_reads.py
@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+
+import pytest
+import os
+import gzip
+
+
+def test_trim_reads_singleend():
+    # assert os.path.getsize('sample1_R1.fastq.gz') != os.path.getsize('sample1_R1.trim.fastq.gz')
+    # check the size of the lines using
+    # a = sum(1 for _ in gzip.open('input_2.small_R1.fastq.gz'))
+    pass
+
+
+def test_trim_reads_pairedend():
+    # Do the same thing for paired end data
+    pass