diff --git a/tests/correlators_test.py b/tests/correlators_test.py
index 0f43c8d6..16719337 100644
--- a/tests/correlators_test.py
+++ b/tests/correlators_test.py
@@ -118,6 +118,7 @@ def test_utility():
     corr.print([2, 4])
     corr.show()
 
+    corr.dump('test_dump', path='.')
     corr.dump('test_dump')
     new_corr = pe.load_object('test_dump.p')
     os.remove('test_dump.p')
diff --git a/tests/mpm_test.py b/tests/mpm_test.py
new file mode 100644
index 00000000..165f09bc
--- /dev/null
+++ b/tests/mpm_test.py
@@ -0,0 +1,14 @@
+import numpy as np
+import pyerrors as pe
+import pytest
+
+np.random.seed(0)
+
+
+def test_mpm():
+    corr_content = []
+    for t in range(8):
+        f = 0.8 * np.exp(-0.4 * t)
+        corr_content.append(pe.pseudo_Obs(np.random.normal(f, 1e-2 * f), 1e-2 * f, 't'))
+
+    res = pe.mpm.matrix_pencil_method(corr_content)