diff --git a/zebra-chain/src/transaction.rs b/zebra-chain/src/transaction.rs
index 5170adf6..e5d603d1 100644
--- a/zebra-chain/src/transaction.rs
+++ b/zebra-chain/src/transaction.rs
@@ -8,8 +8,6 @@ mod serialize;
 mod shielded_data;
 mod transparent;
 
-#[cfg(test)]
-mod test_vectors;
 #[cfg(test)]
 mod tests;
 
diff --git a/zebra-chain/src/transaction/joinsplit.rs b/zebra-chain/src/transaction/joinsplit.rs
index 1eb5be1e..8a530a74 100644
--- a/zebra-chain/src/transaction/joinsplit.rs
+++ b/zebra-chain/src/transaction/joinsplit.rs
@@ -1,8 +1,5 @@
-#[cfg(test)]
-use proptest::{array, collection::vec, prelude::*};
-use serde::{Deserialize, Serialize};
-
 use crate::{ed25519_zebra, notes::sprout, proofs::ZkSnarkProof};
+use serde::{Deserialize, Serialize};
 
 /// A _JoinSplit Description_, as described in [protocol specification §7.2][ps].
 ///
@@ -70,56 +67,6 @@ impl<P: ZkSnarkProof> PartialEq for JoinSplit<P> {
 // Because x25519_dalek::PublicKey does not impl Eq
 impl<P: ZkSnarkProof> Eq for JoinSplit<P> {}
 
-#[cfg(test)]
-impl<P: ZkSnarkProof + Arbitrary + 'static> Arbitrary for JoinSplit<P> {
-    type Parameters = ();
-
-    fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy {
-        (
-            any::<u64>(),
-            any::<u64>(),
-            array::uniform32(any::<u8>()),
-            array::uniform2(array::uniform32(any::<u8>())),
-            array::uniform2(array::uniform32(any::<u8>())),
-            array::uniform32(any::<u8>()),
-            array::uniform32(any::<u8>()),
-            array::uniform2(array::uniform32(any::<u8>())),
-            any::<P>(),
-            array::uniform2(any::<sprout::EncryptedCiphertext>()),
-        )
-            .prop_map(
-                |(
-                    vpub_old,
-                    vpub_new,
-                    anchor,
-                    nullifiers,
-                    commitments,
-                    ephemeral_key_bytes,
-                    random_seed,
-                    vmacs,
-                    zkproof,
-                    enc_ciphertexts,
-                )| {
-                    Self {
-                        vpub_old,
-                        vpub_new,
-                        anchor,
-                        nullifiers,
-                        commitments,
-                        ephemeral_key: x25519_dalek::PublicKey::from(ephemeral_key_bytes),
-                        random_seed,
-                        vmacs,
-                        zkproof,
-                        enc_ciphertexts,
-                    }
-                },
-            )
-            .boxed()
-    }
-
-    type Strategy = BoxedStrategy<Self>;
-}
-
 /// A bundle of JoinSplit descriptions and signature data.
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct JoinSplitData<P: ZkSnarkProof> {
@@ -157,30 +104,3 @@ impl<P: ZkSnarkProof> JoinSplitData<P> {
         std::iter::once(&self.first).chain(self.rest.iter())
     }
 }
-
-#[cfg(test)]
-impl<P: ZkSnarkProof + Arbitrary + 'static> Arbitrary for JoinSplitData<P> {
-    type Parameters = ();
-
-    fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy {
-        (
-            any::<JoinSplit<P>>(),
-            vec(any::<JoinSplit<P>>(), 0..10),
-            array::uniform32(any::<u8>()),
-            vec(any::<u8>(), 64),
-        )
-            .prop_map(|(first, rest, pub_key_bytes, sig_bytes)| Self {
-                first,
-                rest,
-                pub_key: ed25519_zebra::VerificationKeyBytes::from(pub_key_bytes),
-                sig: ed25519_zebra::Signature::from({
-                    let mut b = [0u8; 64];
-                    b.copy_from_slice(sig_bytes.as_slice());
-                    b
-                }),
-            })
-            .boxed()
-    }
-
-    type Strategy = BoxedStrategy<Self>;
-}
diff --git a/zebra-chain/src/transaction/shielded_data.rs b/zebra-chain/src/transaction/shielded_data.rs
index b680efb5..3776c235 100644
--- a/zebra-chain/src/transaction/shielded_data.rs
+++ b/zebra-chain/src/transaction/shielded_data.rs
@@ -1,14 +1,10 @@
-use futures::future::Either;
-
-#[cfg(test)]
-use proptest::{arbitrary::Arbitrary, array, collection::vec, prelude::*};
-
 // XXX this name seems too long?
 use crate::note_commitment_tree::SaplingNoteTreeRootHash;
 use crate::notes::sapling;
 use crate::proofs::Groth16Proof;
 use crate::redjubjub::{self, Binding, SpendAuth};
 use crate::serde_helpers;
+use futures::future::Either;
 
 /// A _Spend Description_, as described in [protocol specification §7.3][ps].
 ///
@@ -33,39 +29,6 @@ pub struct Spend {
     pub spend_auth_sig: redjubjub::Signature<SpendAuth>,
 }
 
-#[cfg(test)]
-impl Arbitrary for Spend {
-    type Parameters = ();
-
-    fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy {
-        (
-            array::uniform32(any::<u8>()),
-            any::<SaplingNoteTreeRootHash>(),
-            array::uniform32(any::<u8>()),
-            array::uniform32(any::<u8>()),
-            any::<Groth16Proof>(),
-            vec(any::<u8>(), 64),
-        )
-            .prop_map(
-                |(cv_bytes, anchor, nullifier_bytes, rpk_bytes, proof, sig_bytes)| Self {
-                    anchor,
-                    cv: cv_bytes,
-                    nullifier: nullifier_bytes,
-                    rk: redjubjub::PublicKeyBytes::from(rpk_bytes),
-                    zkproof: proof,
-                    spend_auth_sig: redjubjub::Signature::from({
-                        let mut b = [0u8; 64];
-                        b.copy_from_slice(sig_bytes.as_slice());
-                        b
-                    }),
-                },
-            )
-            .boxed()
-    }
-
-    type Strategy = BoxedStrategy<Self>;
-}
-
 /// A _Output Description_, as described in [protocol specification §7.4][ps].
 ///
 /// [ps]: https://zips.z.cash/protocol/protocol.pdf#outputencoding
@@ -92,37 +55,6 @@ pub struct Output {
 
 impl Eq for Output {}
 
-#[cfg(test)]
-impl Arbitrary for Output {
-    type Parameters = ();
-
-    fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy {
-        (
-            array::uniform32(any::<u8>()),
-            array::uniform32(any::<u8>()),
-            array::uniform32(any::<u8>()).prop_filter("Valid jubjub::AffinePoint", |b| {
-                jubjub::AffinePoint::from_bytes(*b).is_some().unwrap_u8() == 1
-            }),
-            any::<sapling::EncryptedCiphertext>(),
-            any::<sapling::OutCiphertext>(),
-            any::<Groth16Proof>(),
-        )
-            .prop_map(
-                |(cv, cmu, ephemeral_key_bytes, enc_ciphertext, out_ciphertext, zkproof)| Self {
-                    cv,
-                    cmu,
-                    ephemeral_key: jubjub::AffinePoint::from_bytes(ephemeral_key_bytes).unwrap(),
-                    enc_ciphertext,
-                    out_ciphertext,
-                    zkproof,
-                },
-            )
-            .boxed()
-    }
-
-    type Strategy = BoxedStrategy<Self>;
-}
-
 /// Sapling-on-Groth16 spend and output descriptions.
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct ShieldedData {
@@ -197,33 +129,3 @@ impl std::cmp::PartialEq for ShieldedData {
 }
 
 impl std::cmp::Eq for ShieldedData {}
-
-#[cfg(test)]
-impl Arbitrary for ShieldedData {
-    type Parameters = ();
-
-    fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy {
-        (
-            prop_oneof![
-                any::<Spend>().prop_map(Either::Left),
-                any::<Output>().prop_map(Either::Right)
-            ],
-            vec(any::<Spend>(), 0..10),
-            vec(any::<Output>(), 0..10),
-            vec(any::<u8>(), 64),
-        )
-            .prop_map(|(first, rest_spends, rest_outputs, sig_bytes)| Self {
-                first,
-                rest_spends,
-                rest_outputs,
-                binding_sig: redjubjub::Signature::from({
-                    let mut b = [0u8; 64];
-                    b.copy_from_slice(sig_bytes.as_slice());
-                    b
-                }),
-            })
-            .boxed()
-    }
-
-    type Strategy = BoxedStrategy<Self>;
-}
diff --git a/zebra-chain/src/transaction/tests.rs b/zebra-chain/src/transaction/tests.rs
index ed78f0dd..73872bc7 100644
--- a/zebra-chain/src/transaction/tests.rs
+++ b/zebra-chain/src/transaction/tests.rs
@@ -1,18 +1,15 @@
-use proptest::{
-    arbitrary::{any, Arbitrary},
-    collection::vec,
-    option,
-    prelude::*,
-};
+use proptest::{arbitrary::any, collection::vec, option, prelude::*};
 
 use crate::{
     serialization::{ZcashDeserialize, ZcashSerialize},
-    types::{LockTime, Script},
+    types::LockTime,
 };
 
 use super::*;
 
-#[cfg(test)]
+mod arbitrary;
+mod test_vectors;
+
 impl Transaction {
     pub fn v1_strategy() -> impl Strategy<Value = Self> {
         (
@@ -99,54 +96,6 @@ impl Transaction {
     }
 }
 
-#[cfg(test)]
-impl Arbitrary for Transaction {
-    type Parameters = ();
-
-    fn arbitrary_with(_args: ()) -> Self::Strategy {
-        prop_oneof![
-            Self::v1_strategy(),
-            Self::v2_strategy(),
-            Self::v3_strategy(),
-            Self::v4_strategy()
-        ]
-        .boxed()
-    }
-
-    type Strategy = BoxedStrategy<Self>;
-}
-
-#[cfg(test)]
-impl Arbitrary for TransparentInput {
-    type Parameters = ();
-
-    fn arbitrary_with(_args: ()) -> Self::Strategy {
-        prop_oneof![
-            (any::<OutPoint>(), any::<Script>(), any::<u32>())
-                .prop_map(|(outpoint, script, sequence)| {
-                    TransparentInput::PrevOut {
-                        outpoint,
-                        script,
-                        sequence,
-                    }
-                })
-                .boxed(),
-            (any::<BlockHeight>(), vec(any::<u8>(), 0..95), any::<u32>())
-                .prop_map(|(height, data, sequence)| {
-                    TransparentInput::Coinbase {
-                        height,
-                        data: CoinbaseData(data),
-                        sequence,
-                    }
-                })
-                .boxed(),
-        ]
-        .boxed()
-    }
-
-    type Strategy = BoxedStrategy<Self>;
-}
-
 #[test]
 fn librustzcash_tx_deserialize_and_round_trip() {
     let tx = Transaction::zcash_deserialize(&test_vectors::GENERIC_TESTNET_TX[..])
@@ -158,7 +107,6 @@ fn librustzcash_tx_deserialize_and_round_trip() {
     assert_eq!(&test_vectors::GENERIC_TESTNET_TX[..], &data2[..]);
 }
 
-#[cfg(test)]
 proptest! {
 
     #[test]
diff --git a/zebra-chain/src/transaction/tests/arbitrary.rs b/zebra-chain/src/transaction/tests/arbitrary.rs
new file mode 100644
index 00000000..8a30d768
--- /dev/null
+++ b/zebra-chain/src/transaction/tests/arbitrary.rs
@@ -0,0 +1,224 @@
+use crate::{
+    note_commitment_tree::SaplingNoteTreeRootHash,
+    notes::{sapling, sprout},
+    proofs::{Groth16Proof, ZkSnarkProof},
+    transaction::{
+        CoinbaseData, JoinSplit, JoinSplitData, OutPoint, Output, ShieldedData, Spend, Transaction,
+        TransparentInput,
+    },
+    types::{BlockHeight, Script},
+};
+use futures::future::Either;
+use proptest::{array, collection::vec, prelude::*};
+
+impl<P: ZkSnarkProof + Arbitrary + 'static> Arbitrary for JoinSplit<P> {
+    type Parameters = ();
+
+    fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy {
+        (
+            any::<u64>(),
+            any::<u64>(),
+            array::uniform32(any::<u8>()),
+            array::uniform2(array::uniform32(any::<u8>())),
+            array::uniform2(array::uniform32(any::<u8>())),
+            array::uniform32(any::<u8>()),
+            array::uniform32(any::<u8>()),
+            array::uniform2(array::uniform32(any::<u8>())),
+            any::<P>(),
+            array::uniform2(any::<sprout::EncryptedCiphertext>()),
+        )
+            .prop_map(
+                |(
+                    vpub_old,
+                    vpub_new,
+                    anchor,
+                    nullifiers,
+                    commitments,
+                    ephemeral_key_bytes,
+                    random_seed,
+                    vmacs,
+                    zkproof,
+                    enc_ciphertexts,
+                )| {
+                    Self {
+                        vpub_old,
+                        vpub_new,
+                        anchor,
+                        nullifiers,
+                        commitments,
+                        ephemeral_key: x25519_dalek::PublicKey::from(ephemeral_key_bytes),
+                        random_seed,
+                        vmacs,
+                        zkproof,
+                        enc_ciphertexts,
+                    }
+                },
+            )
+            .boxed()
+    }
+
+    type Strategy = BoxedStrategy<Self>;
+}
+
+impl<P: ZkSnarkProof + Arbitrary + 'static> Arbitrary for JoinSplitData<P> {
+    type Parameters = ();
+
+    fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy {
+        (
+            any::<JoinSplit<P>>(),
+            vec(any::<JoinSplit<P>>(), 0..10),
+            array::uniform32(any::<u8>()),
+            vec(any::<u8>(), 64),
+        )
+            .prop_map(|(first, rest, pub_key_bytes, sig_bytes)| Self {
+                first,
+                rest,
+                pub_key: ed25519_zebra::VerificationKeyBytes::from(pub_key_bytes),
+                sig: ed25519_zebra::Signature::from({
+                    let mut b = [0u8; 64];
+                    b.copy_from_slice(sig_bytes.as_slice());
+                    b
+                }),
+            })
+            .boxed()
+    }
+
+    type Strategy = BoxedStrategy<Self>;
+}
+
+impl Arbitrary for Output {
+    type Parameters = ();
+
+    fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy {
+        (
+            array::uniform32(any::<u8>()),
+            array::uniform32(any::<u8>()),
+            array::uniform32(any::<u8>()).prop_filter("Valid jubjub::AffinePoint", |b| {
+                jubjub::AffinePoint::from_bytes(*b).is_some().unwrap_u8() == 1
+            }),
+            any::<sapling::EncryptedCiphertext>(),
+            any::<sapling::OutCiphertext>(),
+            any::<Groth16Proof>(),
+        )
+            .prop_map(
+                |(cv, cmu, ephemeral_key_bytes, enc_ciphertext, out_ciphertext, zkproof)| Self {
+                    cv,
+                    cmu,
+                    ephemeral_key: jubjub::AffinePoint::from_bytes(ephemeral_key_bytes).unwrap(),
+                    enc_ciphertext,
+                    out_ciphertext,
+                    zkproof,
+                },
+            )
+            .boxed()
+    }
+
+    type Strategy = BoxedStrategy<Self>;
+}
+
+impl Arbitrary for ShieldedData {
+    type Parameters = ();
+
+    fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy {
+        (
+            prop_oneof![
+                any::<Spend>().prop_map(Either::Left),
+                any::<Output>().prop_map(Either::Right)
+            ],
+            vec(any::<Spend>(), 0..10),
+            vec(any::<Output>(), 0..10),
+            vec(any::<u8>(), 64),
+        )
+            .prop_map(|(first, rest_spends, rest_outputs, sig_bytes)| Self {
+                first,
+                rest_spends,
+                rest_outputs,
+                binding_sig: redjubjub::Signature::from({
+                    let mut b = [0u8; 64];
+                    b.copy_from_slice(sig_bytes.as_slice());
+                    b
+                }),
+            })
+            .boxed()
+    }
+
+    type Strategy = BoxedStrategy<Self>;
+}
+
+impl Arbitrary for Spend {
+    type Parameters = ();
+
+    fn arbitrary_with(_args: Self::Parameters) -> Self::Strategy {
+        (
+            array::uniform32(any::<u8>()),
+            any::<SaplingNoteTreeRootHash>(),
+            array::uniform32(any::<u8>()),
+            array::uniform32(any::<u8>()),
+            any::<Groth16Proof>(),
+            vec(any::<u8>(), 64),
+        )
+            .prop_map(
+                |(cv_bytes, anchor, nullifier_bytes, rpk_bytes, proof, sig_bytes)| Self {
+                    anchor,
+                    cv: cv_bytes,
+                    nullifier: nullifier_bytes,
+                    rk: redjubjub::PublicKeyBytes::from(rpk_bytes),
+                    zkproof: proof,
+                    spend_auth_sig: redjubjub::Signature::from({
+                        let mut b = [0u8; 64];
+                        b.copy_from_slice(sig_bytes.as_slice());
+                        b
+                    }),
+                },
+            )
+            .boxed()
+    }
+
+    type Strategy = BoxedStrategy<Self>;
+}
+
+impl Arbitrary for Transaction {
+    type Parameters = ();
+
+    fn arbitrary_with(_args: ()) -> Self::Strategy {
+        prop_oneof![
+            Self::v1_strategy(),
+            Self::v2_strategy(),
+            Self::v3_strategy(),
+            Self::v4_strategy()
+        ]
+        .boxed()
+    }
+
+    type Strategy = BoxedStrategy<Self>;
+}
+
+impl Arbitrary for TransparentInput {
+    type Parameters = ();
+
+    fn arbitrary_with(_args: ()) -> Self::Strategy {
+        prop_oneof![
+            (any::<OutPoint>(), any::<Script>(), any::<u32>())
+                .prop_map(|(outpoint, script, sequence)| {
+                    TransparentInput::PrevOut {
+                        outpoint,
+                        script,
+                        sequence,
+                    }
+                })
+                .boxed(),
+            (any::<BlockHeight>(), vec(any::<u8>(), 0..95), any::<u32>())
+                .prop_map(|(height, data, sequence)| {
+                    TransparentInput::Coinbase {
+                        height,
+                        data: CoinbaseData(data),
+                        sequence,
+                    }
+                })
+                .boxed(),
+        ]
+        .boxed()
+    }
+
+    type Strategy = BoxedStrategy<Self>;
+}
diff --git a/zebra-chain/src/transaction/test_vectors.rs b/zebra-chain/src/transaction/tests/test_vectors.rs
similarity index 100%
rename from zebra-chain/src/transaction/test_vectors.rs
rename to zebra-chain/src/transaction/tests/test_vectors.rs