diff --git a/tests/test_fold_constants.py b/tests/test_fold_constants.py
new file mode 100644
index 0000000000000000000000000000000000000000..ed6bb3815dbbb495b3f8c518505abbdf54759b59
--- /dev/null
+++ b/tests/test_fold_constants.py
@@ -0,0 +1,26 @@
+from pkgutil import get_data
+
+import numpy as np
+import onnx
+import onnx.numpy_helper as np_helper
+
+import finn.core.onnx_exec as oxe
+import finn.transformation.fold_constants as fc
+import finn.transformation.infer_shapes as si
+from finn.core.modelwrapper import ModelWrapper
+
+
+def test_const_folding():
+    raw_m = get_data("finn", "data/onnx/mnist-conv/model.onnx")
+    model = ModelWrapper(raw_m)
+    model = model.transform_single(si.infer_shapes)
+    model = model.transform_single(fc.fold_constants)
+    raw_i = get_data("finn", "data/onnx/mnist-conv/test_data_set_0/input_0.pb")
+    raw_o = get_data("finn", "data/onnx/mnist-conv/test_data_set_0/output_0.pb")
+    input_tensor = onnx.load_tensor_from_string(raw_i)
+    output_tensor = onnx.load_tensor_from_string(raw_o)
+    input_dict = {"Input3": np_helper.to_array(input_tensor)}
+    output_dict = oxe.execute_onnx(model, input_dict)
+    assert np.isclose(
+        np_helper.to_array(output_tensor), output_dict["Plus214_Output_0"], atol=1e-3
+    ).all()