diff --git a/examples/export_test_keys/main.rs b/examples/export_test_keys/main.rs
index 6038e31..187fcac 100644
--- a/examples/export_test_keys/main.rs
+++ b/examples/export_test_keys/main.rs
@@ -1,29 +1,32 @@
-use sapling_crypto::bellman::pairing::Engine;
-use std::fs::File;
-
+#[cfg(not(target_arch = "wasm32"))]
 fn main() {
-  use sapling_crypto::bellman::pairing::bn256::Bn256;
-  let merkle_depth = 32usize;
-  export_test_keys::<Bn256>(merkle_depth);
+    use sapling_crypto::bellman::pairing::bn256::Bn256;
+    let merkle_depth = 32usize;
+    test_keys::export::<Bn256>(merkle_depth);
 }
 
-fn export_test_keys<E: Engine>(merkle_depth: usize) {
-  use rand::{SeedableRng, XorShiftRng};
-  use rln::circuit::poseidon::PoseidonCircuit;
-  use rln::circuit::rln::{RLNCircuit, RLNInputs};
-  use rln::poseidon::PoseidonParams;
-  use sapling_crypto::bellman::groth16::generate_random_parameters;
-  let poseidon_params = PoseidonParams::<E>::default();
-  let mut rng = XorShiftRng::from_seed([0x3dbe6258, 0x8d313d76, 0x3237db17, 0xe5bc0654]);
-  let hasher = PoseidonCircuit::new(poseidon_params.clone());
-  let circuit = RLNCircuit::<E> {
-    inputs: RLNInputs::<E>::empty(merkle_depth),
-    hasher: hasher.clone(),
-  };
-  let parameters = generate_random_parameters(circuit, &mut rng).unwrap();
-  let mut file_vk = File::create("verifier.key").unwrap();
-  let vk = parameters.vk.clone();
-  vk.write(&mut file_vk).unwrap();
-  let mut file_paramaters = File::create("parameters.key").unwrap();
-  parameters.write(&mut file_paramaters).unwrap();
+#[cfg(not(target_arch = "wasm32"))]
+mod test_keys {
+    use sapling_crypto::bellman::pairing::Engine;
+    pub fn export<E: Engine>(merkle_depth: usize) {
+        use rand::{SeedableRng, XorShiftRng};
+        use rln::circuit::poseidon::PoseidonCircuit;
+        use rln::circuit::rln::{RLNCircuit, RLNInputs};
+        use rln::poseidon::PoseidonParams;
+        use sapling_crypto::bellman::groth16::generate_random_parameters;
+        use std::fs::File;
+        let poseidon_params = PoseidonParams::<E>::default();
+        let mut rng = XorShiftRng::from_seed([0x3dbe6258, 0x8d313d76, 0x3237db17, 0xe5bc0654]);
+        let hasher = PoseidonCircuit::new(poseidon_params.clone());
+        let circuit = RLNCircuit::<E> {
+            inputs: RLNInputs::<E>::empty(merkle_depth),
+            hasher: hasher.clone(),
+        };
+        let parameters = generate_random_parameters(circuit, &mut rng).unwrap();
+        let mut file_vk = File::create("verifier.key").unwrap();
+        let vk = parameters.vk.clone();
+        vk.write(&mut file_vk).unwrap();
+        let mut file_paramaters = File::create("parameters.key").unwrap();
+        parameters.write(&mut file_paramaters).unwrap();
+    }
 }