diff --git a/tests/unit/test_rose_stem_units.py b/tests/unit/test_rose_stem_units.py
index 6c13bcd5..83d0a7f7 100644
--- a/tests/unit/test_rose_stem_units.py
+++ b/tests/unit/test_rose_stem_units.py
@@ -30,6 +30,14 @@
 from metomi.rose.fs_util import FileSystemUtil
 
 
+class MockPopen:
+    def __init__(self, mocked_return):
+        self.mocked_return = mocked_return
+
+    def run(self, *args):
+        return self.mocked_return
+
+
 @pytest.mark.parametrize(
     'args, expect',
     [
@@ -133,11 +141,8 @@ def test__add_define_option(get_StemRunner, capsys, exisiting_defines):
 )
 def test__get_fcm_loc_layout_info(get_StemRunner, capsys, mocked_return):
     """It parses information from fcm loc layout"""
-    class MockPopen:
-        def run(*args):
-            return mocked_return
 
-    stemrunner = get_StemRunner({'popen': MockPopen()})
+    stemrunner = get_StemRunner({'popen': MockPopen(mocked_return)})
 
     if mocked_return[0] == 0:
         expect = {
@@ -149,3 +154,29 @@ def run(*args):
         with pytest.raises(ProjectNotFoundException) as exc:
             stemrunner._get_fcm_loc_layout_info('foo')
         assert mocked_return[2] in str(exc.value)
+
+
+@pytest.mark.parametrize(
+    'source_dict, expect',
+    [
+        param(
+            {
+                'root': 'svn://subversive',
+                'project': 'waltheof',
+                'url': 'Irrelevent, it\'s mocked away, but required.'
+            },
+            'waltheof',
+            id='all paths true'
+        )
+    ]
+)
+def test__get_project_from_url(get_StemRunner, source_dict, expect):
+    mockreturn = (
+        0,
+        "location{primary}[mortimer] = svn://subversive/rogermortimer\n"
+        "location{primary}[fenwick] = svn://subversive/johnfenwick\n"
+        "location{primary}[waltheof] = svn://subversive/waltheof\n",
+    )
+    stemrunner = get_StemRunner({'popen': MockPopen(mockreturn)})
+    project = stemrunner._get_project_from_url(source_dict)
+    assert project == expect