diff --git a/.github/workflows/build_pyodide.yml b/.github/workflows/build_pyodide.yml
index b69c1db125..8318460149 100644
--- a/.github/workflows/build_pyodide.yml
+++ b/.github/workflows/build_pyodide.yml
@@ -84,16 +84,13 @@ jobs:
 
       - name: Run wheel tests
         run: |
-          cp -r IfcOpenShell/pyodide/test test
           # venv set up in build_pyodide.sh.
           source .venv/bin/activate
-          uv pip install pytest-pyodide
-          PYODIDE_ROOT_DIST=`pyodide config get pyodide_root`/dist
-          # `pytest-pyodide` requires pyodide in 'pyodide' directory in cwd, when running `pytest`.
-          cp -r $PYODIDE_ROOT_DIST test/pyodide
-          cp dist/ifcopenshell-*.whl test/pyodide
-          cd test
-          pytest --capture=no
+          ln -s "$PWD/dist" IfcOpenShell/dist
+          ln -s "$PWD/dist-modular" IfcOpenShell/dist-modular
+          cd IfcOpenShell/pyodide
+          ./run_pytest.py setup
+          ./run_pytest.py run
 
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v6
diff --git a/.gitignore b/.gitignore
index addd55528c..51ac937751 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,9 @@
 /src/ifcmax/out/
 /src/ifcwrap/out/
 /src/ifctester/webapp/public/pyodide/
+# pyodide wheels
+/dist/
+/dist-modular/
 
 /win/BuildDepsCache*.txt
 
diff --git a/pyodide/README.md b/pyodide/README.md
index 0bab71fa30..c7ce24321d 100644
--- a/pyodide/README.md
+++ b/pyodide/README.md
@@ -30,3 +30,8 @@ since it's pure cmake without any additional moving parts.
     - it will produce Python package in `IfcOpenShell/ifcopenshell`
 - run `pyodide build`
     - it will produce a wheel in `IfcOpenShell/dist`
+- testing:
+  - ensure you're in pyodide environment
+  - `cd IfcOpenshell/pyodide`
+  - `./run_pytest.py setup`
+  - `./run_pytest.py run`
diff --git a/pyodide/__init__.py b/pyodide/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/pyodide/run_pytest.py b/pyodide/run_pytest.py
new file mode 100755
index 0000000000..828e2b1cd0
--- /dev/null
+++ b/pyodide/run_pytest.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+import argparse
+import shlex
+import shutil
+import subprocess
+from pathlib import Path
+
+SCRIPT_DIR = Path(__file__).parent
+
+DIST_DIRS = (
+    SCRIPT_DIR / "test/pyodide",
+    SCRIPT_DIR / "test/pyodide-modular",
+)
+WHEEL_SRCS = (
+    SCRIPT_DIR / "../dist",
+    SCRIPT_DIR / "../dist-modular",
+)
+
+
+def run(cmd: list, **kwargs) -> None:
+    print("$", shlex.join(str(part) for part in cmd))
+    subprocess.check_call(cmd, **kwargs)
+
+
+def setup() -> None:
+    run(["uv", "pip", "install", "pytest-pyodide"])
+
+    # Copy pyodide installation so we can modify it locally just for tests.
+    pyodide_root = subprocess.check_output(["pyodide", "config", "get", "pyodide_root"], text=True).strip()
+    pyodide_root_dist = Path(pyodide_root) / "dist"
+    for dist_dir in DIST_DIRS:
+        if dist_dir.exists():
+            shutil.rmtree(dist_dir)
+        shutil.copytree(pyodide_root_dist, dist_dir)
+
+
+def run_tests() -> None:
+    for dist_dir, wheel_src in zip(DIST_DIRS, WHEEL_SRCS):
+        if not wheel_src.exists():
+            raise RuntimeError(f"error: {wheel_src} does not exist")
+
+        # Clean up previous wheels.
+        for whl in dist_dir.glob("ifcopenshell*.whl"):
+            whl.unlink()
+
+        # Symlink new ones.
+        for whl in wheel_src.glob("ifcopenshell*.whl"):
+            (dist_dir / whl.name).symlink_to(whl.resolve())
+
+    for dist_dir in DIST_DIRS:
+        run(["pytest", f"--dist-dir={dist_dir}", "--capture=no"], cwd=SCRIPT_DIR)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("command", choices=["setup", "run"])
+    args = parser.parse_args()
+
+    if args.command == "setup":
+        setup()
+    else:
+        run_tests()
diff --git a/pyodide/test/.gitignore b/pyodide/test/.gitignore
new file mode 100644
index 0000000000..e2b605aed2
--- /dev/null
+++ b/pyodide/test/.gitignore
@@ -0,0 +1,2 @@
+pyodide
+pyodide-modular
diff --git a/pyodide/test/__init__.py b/pyodide/test/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/pyodide/test/test_wheel.py b/pyodide/test/test_wheel.py
index 2ef5e0e193..a23b72c493 100644
--- a/pyodide/test/test_wheel.py
+++ b/pyodide/test/test_wheel.py
@@ -1,18 +1,30 @@
+import zipfile
 from pathlib import Path
 
-WHEEL_FILENAME = next(
-    p.name for p in (Path.cwd() / "pyodide").iterdir() if p.name.startswith("ifcopenshell-") and p.suffix == ".whl"
-)
+from ..order_pyodide_wheel_shared_objects import shared_object_sort_key
 
 
-def test_ifcopenshell_import(selenium):
+def _first_so_name(wheel_path: Path) -> str:
+    with zipfile.ZipFile(wheel_path) as zf:
+        for name in zf.namelist():
+            if name.endswith(".so"):
+                return Path(name).name
+    return wheel_path.name
+
+
+def test_ifcopenshell_import(selenium, request):
+    dist_dir = Path(request.config.getoption("--dist-dir"))
+    wheel_paths = list(dist_dir.glob("ifcopenshell*.whl"))
+    wheel_paths.sort(key=lambda path: shared_object_sort_key(_first_so_name(path), 0))
+    WHEEL_NAMES = tuple(path.name for path in wheel_paths)
+
     selenium.load_package("micropip")
-    # Important to test it with `micropip.install`
-    # without any dependencies loaded to ensure micropip will load them automatically.
-    selenium.run_async(
-        f"""
+    selenium.run_async(f"""
         import micropip
-        await micropip.install(f"./{WHEEL_FILENAME}")
+        wheel_filenames = {WHEEL_NAMES!r}
+        for wheel_filename in wheel_filenames:
+            print(f"Loading {{wheel_filename}}...")
+            await micropip.install(f"./{{wheel_filename}}")
         import ifcopenshell
         from pathlib import Path
         ifcopenshell.set_plugin_search_paths([str(Path(ifcopenshell.__file__).parent)])
@@ -24,5 +36,4 @@ def test_ifcopenshell_import(selenium):
         wall.Name = "Test"
         assert wall.Name == "Test", f"Entity name wasn't changed: {{wall}}"
         print(wall)
-        """
-    )
+        """)
diff --git a/pyproject.toml b/pyproject.toml
index 519ef3b73e..2bd6b6c3ea 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,6 +9,7 @@ line-length = 120
 include = '''
     src/.*.pyi?$
     |nix/.*.pyi?$
+    |pyodide/.*.pyi?$
 '''
 extend-exclude = '''
     src/ifcopenshell-python/ifcopenshell/express/rules/*