diff --git a/.changelog/unreleased/testing/876-faster-epoch-test.md b/.changelog/unreleased/testing/876-faster-epoch-test.md
new file mode 100644
index 00000000000..f387dee313b
--- /dev/null
+++ b/.changelog/unreleased/testing/876-faster-epoch-test.md
@@ -0,0 +1,2 @@
+- Run fewer cases on update_epoch_after_its_duration, for a faster test suite.
+  ([#876](https://github.com/anoma/namada/pull/876))
\ No newline at end of file
diff --git a/core/src/ledger/storage/mod.rs b/core/src/ledger/storage/mod.rs
index 8285e58bab1..5d0befbaca7 100644
--- a/core/src/ledger/storage/mod.rs
+++ b/core/src/ledger/storage/mod.rs
@@ -1211,6 +1211,7 @@ pub mod testing {
 mod tests {
     use chrono::{TimeZone, Utc};
     use proptest::prelude::*;
+    use proptest::test_runner::Config;
     use rust_decimal_macros::dec;
 
     use super::testing::*;
@@ -1259,6 +1260,10 @@ mod tests {
     }
 
     proptest! {
+        #![proptest_config(Config {
+            cases: 10,
+            .. Config::default()
+        })]
         /// Test that:
         /// 1. When the minimum blocks have been created since the epoch
         ///    start height and minimum time passed since the epoch start time,