diff --git a/zebra-chain/proptest-regressions/keys/sprout.txt b/zebra-chain/proptest-regressions/keys/sprout.txt
new file mode 100644
index 000000000..3b80d4123
--- /dev/null
+++ b/zebra-chain/proptest-regressions/keys/sprout.txt
@@ -0,0 +1,8 @@
+# Seeds for failure cases proptest has generated in the past. It is
+# automatically read and these particular cases re-run before any
+# novel cases are generated.
+#
+# It is recommended to check this file in to source control so that
+# everyone who runs the test benefits from these saved cases.
+cc 62e2e4683c730eed75125459da772456b5a6722bb681d5a7369ee074f0491df0 # shrinks to sk = SpendingKey { bytes: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], network: Mainnet }
+cc 60b90e63a54bf680d37693716d493b302dae7b88fb4b2101b0d20cf28df25489 # shrinks to sk = SpendingKey { bytes: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], network: Mainnet }