diff --git a/.appveyor.yml b/.appveyor.yml
index 1374f33..6dc7e06 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -225,7 +225,7 @@ for:
           export TMPDIR=/crippledfs
         fi
       - echo TMPDIR=$TMPDIR
-      - hatch test --cover
+      - hatch test --cover --doctest-modules
 
     after_test:
       - python -m coverage xml
diff --git a/README.md b/README.md
index a6c47ad..2a93ec5 100644
--- a/README.md
+++ b/README.md
@@ -25,9 +25,7 @@ shell command, while reading its output back as a Python iterable.
 >>> with iter_subproc(['cat'], inputs=[b'one', b'two', b'three']) as proc:
 ...     for chunk in proc:
 ...         print(chunk)
-b'one'
-b'two'
-b'three'
+b'onetwothree'
 ```
 
 ## Developing with datasalad
diff --git a/datasalad/runners/iter_subproc.py b/datasalad/runners/iter_subproc.py
index 9abb1af..981871b 100644
--- a/datasalad/runners/iter_subproc.py
+++ b/datasalad/runners/iter_subproc.py
@@ -74,9 +74,7 @@ def iter_subproc(
     >>> with iter_subproc(['cat'], inputs=[b'one', b'two', b'three']) as proc:
     ...     for chunk in proc:
     ...         print(chunk)
-    b'one'
-    b'two'
-    b'three'
+    b'onetwothree'
 
     Note, if an exception is raised in the context, this exception will bubble
     up to the main thread. That means no ``CommandError`` will
@@ -90,13 +88,15 @@ def iter_subproc(
     ``CommandError`` is raised. The return code is read from
     the variable ``ls_stdout``
 
-    >>> try:
-    ...     with iter_subproc(['ls', '-@']) as ls_stdout:
-    ...         while True:
-    ...             next(ls_stdout)
-    ... except Exception as e:
-    ...     print(repr(e), ls_stdout.returncode)
-    StopIteration() 2
+    .. code-block:: python
+
+     >> try:
+     ..     with iter_subproc(['ls', '-@']) as ls_stdout:
+     ..         while True:
+     ..             next(ls_stdout)
+     .. except Exception as e:
+     ..     print(repr(e), ls_stdout.returncode)
+     StopIteration() 2
 
 
     Parameters