diff --git a/create_node_modules.sh b/create_node_modules.sh
new file mode 100644
index 0000000..3346821
--- /dev/null
+++ b/create_node_modules.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+#
+# Script to create node_modules.tar.xz for the tests.
+# Adapted from .github/workflows/test.yml
+# Execute this in an extracted github archive/cloned repository
+# Note: The pathname MUST NOT include any ':' as is common
+# in checked out obs package directories.
+
+# requires: yarn, npm
+
+pushd javascript
+yarn
+yarn build
+popd
+pushd tests
+npm install
+popd
+
+tar cJf node_modules.tar.xz \
+  yarn.lock \
+  package-lock.json \
+  node_modules \
+  javascript/lib \
+  javascript/node_modules \
+  javascript/tsconfig.tsbuildinfo
+  
\ No newline at end of file
diff --git a/jupyter_ydoc-0.3.1.tar.gz b/jupyter_ydoc-0.3.1.tar.gz
new file mode 100644
index 0000000..8be6d99
--- /dev/null
+++ b/jupyter_ydoc-0.3.1.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:23948daf60a0c3c0a4b3715a66cb6ccad2de56694864842534fb1b1564b9b56b
+size 148355
diff --git a/node_modules.tar.xz b/node_modules.tar.xz
new file mode 100644
index 0000000..f204de8
--- /dev/null
+++ b/node_modules.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4fca47a96125f721282d6026d9379d3d7bab7cc3520bebb1eee67ea991f67f53
+size 22739720
diff --git a/python-jupyter-ydoc.changes b/python-jupyter-ydoc.changes
index 2339b5e..b272d59 100644
--- a/python-jupyter-ydoc.changes
+++ b/python-jupyter-ydoc.changes
@@ -3,3 +3,5 @@ Sun Feb  5 16:52:33 UTC 2023 - Ben Greiner <code@bnavigator.de>
 
 - Initial specfile for v0.3.1
 - Required by jupyterlab 3.6
+- Provide node_modules.tar.xz generated by create_node_modules.sh
+  for the tests. Those modules are not part of the python package
diff --git a/python-jupyter-ydoc.spec b/python-jupyter-ydoc.spec
index 692aad9..c717cd5 100644
--- a/python-jupyter-ydoc.spec
+++ b/python-jupyter-ydoc.spec
@@ -22,20 +22,31 @@ Release:        0
 Summary:        Document structures for collaborative editing using Ypy
 License:        BSD-3-Clause
 URL:            https://github.com/jupyter-server/jupyter_ydoc
-Source:         https://github.com/jupyter-server/jupyter_ydoc/archive/refs/tags/v%{version}.tar.gz#/jupyter_ydoc-%{version}-gh.tar.gz
-BuildRequires:  python-rpm-macros
-BuildRequires:  %{python_module pip}
+# Versioned sdist
+Source0:        https://files.pythonhosted.org/packages/source/j/jupyter-ydoc/jupyter_ydoc-%{version}.tar.gz
+# unversioned, but tests
+Source1:        https://github.com/jupyter-server/jupyter_ydoc/archive/refs/tags/v%{version}.tar.gz#/jupyter_ydoc-%{version}-gh.tar.gz
+Source2:        node_modules.tar.xz
+# Execute this on every package update. See comments in the script.
+Source3:        create_node_modules.sh
+BuildRequires:  %{python_module base >= 3.7}
+BuildRequires:  %{python_module hatch_nodejs_version}
 BuildRequires:  %{python_module hatchling}
-BuildRequires:  %{python_module hatch-nodejs-version}
+BuildRequires:  %{python_module pip}
 BuildRequires:  fdupes
+BuildRequires:  python-rpm-macros
 Requires:       (python-importlib-metadata if python-base < 3.10)
 Requires:       (python-y-py >= 0.5.3 with python-y-py < 0.6.0)
+BuildArch:      noarch
 # SECTION test
 BuildRequires:  %{python_module importlib-metadata if %python-base < 3.10}
-BuildRequires:  %{python_module y-py >= 0.5.3 with %python-y-py < 0.6.0}
+BuildRequires:  %{python_module pytest-asyncio}
 BuildRequires:  %{python_module pytest}
+BuildRequires:  %{python_module websockets >= 10.0}
+BuildRequires:  %{python_module y-py >= 0.5.3 with %python-y-py < 0.6.0}
+BuildRequires:  %{python_module ypy-websocket >= 0.3.1}
+BuildRequires:  nodejs
 # /SECTION
-BuildArch:      noarch
 %python_subpackages
 
 %description
@@ -45,9 +56,8 @@ Built-in documents include:
   - `YUnicode`: a generic UTF8-encoded text document (`YFile` is an alias to `YUnicode`).
   - `YNotebook`: a Jupyter notebook document.
 
-
 %prep
-%setup -q -n jupyter-ydoc-%{version}
+%setup -q -n jupyter_ydoc-%{version} -b1 -a2
 
 %build
 %pyproject_wheel
@@ -61,6 +71,6 @@ Built-in documents include:
 
 %files %{python_files}
 %{python_sitelib}/jupyter_ydoc
-%{python_sitelib}/jupyter_ydoc-%{release}.dist-info
+%{python_sitelib}/jupyter_ydoc-%{version}.dist-info
 
 %changelog