diff --git a/test/completion/import_tree/__init__.py b/test/completion/import_tree/__init__.py
index 8153c451..5cbbcd7d 100644
--- a/test/completion/import_tree/__init__.py
+++ b/test/completion/import_tree/__init__.py
@@ -1 +1,7 @@
 a = ''
+
+from . import invisible_pkg
+
+the_pkg = invisible_pkg
+
+invisible_pkg = 1
diff --git a/test/completion/imports.py b/test/completion/imports.py
index 9e75c9d6..fa58c57c 100644
--- a/test/completion/imports.py
+++ b/test/completion/imports.py
@@ -110,6 +110,23 @@ def as_imports():
     #? int()
     bar.a
 
+
+def test_import_priorities():
+    """
+    It's possible to overwrite import paths in an ``__init__.py`` file, by
+    just assigining something there.
+
+    See also #536.
+    """
+    from import_tree import the_pkg, invisible_pkg
+    # TODO currently not enabled, later we should actually fix this.
+    ##? int()
+    invisible_pkg
+    # The renamed invisible_pkg in that module (look at ``__init__.py``!)
+    #? float()
+    the_pkg.foo
+
+
 # -----------------
 # std lib modules
 # -----------------
diff --git a/test/completion/on_import.py b/test/completion/on_import.py
index 18d82bdb..ee826f15 100644
--- a/test/completion/on_import.py
+++ b/test/completion/on_import.py
@@ -65,7 +65,7 @@ import datetime.date
 from import_tree.pkg import pkg
 #? 22 ['mod1']
 from import_tree.pkg. import mod1
-#? 17 ['mod1', 'mod2', 'random', 'pkg', 'rename1', 'rename2', 'recurse_class1', 'recurse_class2']
+#? 17 ['mod1', 'mod2', 'random', 'pkg', 'rename1', 'rename2', 'recurse_class1', 'recurse_class2', 'invisible_pkg']
 from import_tree. import pkg
 
 #? 18 ['pkg']