diff --git a/units/tests/str.rs b/units/tests/str.rs
new file mode 100644
index 000000000..89068bf9b
--- /dev/null
+++ b/units/tests/str.rs
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: CC0-1.0
+
+//! Do basic regression tests on the `Display` and `FromStr` impls.
+
+use bitcoin_units::locktime::{absolute, relative};
+use bitcoin_units::{Amount, BlockHeight, BlockInterval, FeeRate, SignedAmount, Weight};
+
+macro_rules! check {
+    ($($test_name:ident, $ty:path, $val:path, $str:literal);* $(;)?) => {
+        $(
+            #[test]
+            fn $test_name() {
+                let got = format!("{}", $val);
+                assert_eq!(got, $str);
+
+                let got = $str.parse::<$ty>().unwrap();
+                assert_eq!(got, $val)
+            }
+        )*
+    }
+}
+
+check! {
+    amount_unsigned_one_sat, Amount, Amount::ONE_SAT, "0.00000001 BTC";
+    amount_unsigned_max_money, Amount, Amount::MAX_MONEY, "21000000 BTC";
+
+    amount_signed_one_sat, SignedAmount, SignedAmount::ONE_SAT, "0.00000001 BTC";
+    amount_signed_max_money, SignedAmount, SignedAmount::MAX_MONEY, "21000000 BTC";
+
+    block_height_min, BlockHeight, BlockHeight::MIN, "0";
+    block_height_max, BlockHeight, BlockHeight::MAX, "4294967295";
+
+    block_interval_min, BlockInterval, BlockInterval::MIN, "0";
+    block_interval_max, BlockInterval, BlockInterval::MAX, "4294967295";
+
+    fee_rate_min, FeeRate, FeeRate::MIN, "0";
+    fee_rate_max, FeeRate, FeeRate::MAX, "18446744073709551615";
+    fee_rate_dust, FeeRate, FeeRate::DUST, "750";
+
+    lock_time_absolute_min, absolute::Height, absolute::Height::MIN, "0";
+    lock_time_absolute_max, absolute::Height, absolute::Height::MAX, "499999999";
+
+    lock_time_relative_min, relative::Height, relative::Height::MIN, "0";
+    lock_time_relative_max, relative::Height, relative::Height::MAX, "65535";
+
+    weight_min, Weight, Weight::MIN, "0";
+    weight_max, Weight, Weight::MAX, "18446744073709551615";
+    weight_max_block, Weight, Weight::MAX_BLOCK, "4000000";
+}