diff --git a/tests/test_parfile.py b/tests/test_parfile.py
index 6ca51b785..2df312032 100644
--- a/tests/test_parfile.py
+++ b/tests/test_parfile.py
@@ -1,25 +1,66 @@
 #! /usr/bin/env python
-import sys,os
+import os
+import sys
+import tempfile
+
+import pytest
+
 import pint.models as tm
+from pinttestdata import datadir, testdir
+
+datadir = os.path.join(testdir, "datafile")
+parfile = os.path.join(datadir, "J1744-1134.basic.par")
+
+
+def demo_parfile():
+
+    m = tm.get_model(parfile)
+
+    print("model.param_help():")
+    m.param_help()
+    print()
+
+    print("calling model.read_parfile():")
+    m.read_parfile(parfile)
+    print()
+
+    print("print model:")
+    print(m)
+    print()
+
+    print("model.as_parfile():")
+    print(m.as_parfile())
+    print()
+
+
+params = tm.get_model(parfile).params
 
-from pinttestdata import testdir, datadir
-datadir = os.path.join(testdir,'datafile')
-parfile = os.path.join(datadir,'J1744-1134.basic.par')
 
-m = tm.get_model(parfile)
+@pytest.fixture
+def roundtrip():
+    m = tm.get_model(parfile)
+    with tempfile.NamedTemporaryFile("wt") as f:
+        f.write(m.as_parfile())
+        f.flush()
+        m2 = tm.get_model(f.name)
+    return m, m2
 
-print("model.param_help():")
-m.param_help()
-print()
 
-print("calling model.read_parfile():")
-m.read_parfile(parfile)
-print()
+def test_roundtrip(roundtrip):
+    m, m2 = roundtrip
+    assert set(m.components.keys()) == set(m2.components.keys())
+    assert set(m.params) == set(m2.params)
 
-print("print model:")
-print(m)
-print()
 
-print("model.as_parfile():")
-print(m.as_parfile())
-print()
+@pytest.mark.parametrize("p", params)
+def test_roundtrip(roundtrip, p):
+    m, m2 = roundtrip
+    pm = getattr(m, p)
+    pm2 = getattr(m2, p)
+    assert type(pm) == type(pm2)
+    assert pm.frozen == pm2.frozen
+    assert pm.description == pm2.description
+    if hasattr(pm, "units"):
+        assert pm.units == pm2.units
+    assert pm.uncertainty == pm2.uncertainty
+    assert pm.value == pm2.value