diff --git a/tests/unit/credential_tests.rs b/tests/unit/credential_tests.rs
index cb1098e..f6868b8 100644
--- a/tests/unit/credential_tests.rs
+++ b/tests/unit/credential_tests.rs
@@ -330,4 +330,49 @@ mod credential_unit_tests {
         let info = client.verify_credential(&cred_id);
         assert_eq!(info.metadata_uri, valid_uri);
     }
+
+    #[test]
+    fn test_renew_credential_extends_expiry() {
+        let env = Env::default();
+        let (_admin, contract_id, tracker_id) = setup_contract(&env);
+        let client = CredentialNftClient::new(&env, &contract_id);
+
+        let learner = Address::generate(&env);
+        env.mock_all_auths();
+
+        let course_id = Symbol::new(&env, "rust_101");
+        enrolled_and_completed_with_score(&env, &tracker_id, &learner, &course_id, 90);
+        let metadata_uri = Symbol::new(&env, "ipfs_Qm123ValidURI");
+        let cred_id = client.mint_credential(&learner, &course_id, &90, &metadata_uri);
+
+        let before = client.verify_credential(&cred_id);
+        let new_expiry = before.expiry + 10_000;
+
+        client.renew_credential(&cred_id, &new_expiry);
+
+        let after = client.verify_credential(&cred_id);
+        assert_eq!(after.expiry, new_expiry);
+        assert!(after.expiry > before.expiry);
+    }
+
+    #[test]
+    fn test_revoke_credential_with_reason_is_stored_and_queryable() {
+        let env = Env::default();
+        let (_admin, contract_id, tracker_id) = setup_contract(&env);
+        let client = CredentialNftClient::new(&env, &contract_id);
+
+        let learner = Address::generate(&env);
+        env.mock_all_auths();
+
+        let course_id = Symbol::new(&env, "rust_101");
+        enrolled_and_completed_with_score(&env, &tracker_id, &learner, &course_id, 90);
+        let metadata_uri = Symbol::new(&env, "ipfs_Qm123ValidURI");
+        let cred_id = client.mint_credential(&learner, &course_id, &90, &metadata_uri);
+
+        let reason = Symbol::new(&env, "fraud_detected");
+        client.revoke_credential_with_reason(&cred_id, &reason);
+
+        let stored_reason = client.get_revocation_reason(&cred_id);
+        assert_eq!(stored_reason, Some(reason));
+    }
 }
diff --git a/tests/unit/progress_tests.rs b/tests/unit/progress_tests.rs
index feae6e2..a23f537 100644
--- a/tests/unit/progress_tests.rs
+++ b/tests/unit/progress_tests.rs
@@ -1992,4 +1992,35 @@ mod progress_unit_tests {
             soroban_sdk::String::from_str(&env, "progress-tracker")
         );
     }
+
+    // ── Issue #299: course archiving ──────────────────────────────────────
+
+    #[test]
+    fn test_archive_course_rejects_new_enrollments_but_preserves_progress() {
+        let env = Env::default();
+        let (_admin, contract_id) = setup_contract(&env);
+        let client = ProgressTrackerClient::new(&env, &contract_id);
+        env.mock_all_auths();
+
+        let course_id = create_test_course(&env, &client);
+
+        let existing_learner = Address::generate(&env);
+        client.enroll(&existing_learner, &course_id);
+        client.complete_module(&existing_learner, &course_id, &Symbol::new(&env, "mod_1"));
+
+        let progress_before = client.get_progress(&existing_learner, &course_id);
+
+        client.archive_course(&course_id);
+
+        let new_learner = Address::generate(&env);
+        let result = client.try_enroll(&new_learner, &course_id);
+        assert!(result.is_err(), "enrollment on an archived course should be rejected");
+
+        let progress_after = client.get_progress(&existing_learner, &course_id);
+        assert_eq!(
+            progress_after.overall_progress,
+            progress_before.overall_progress,
+            "existing progress must be preserved after archiving"
+        );
+    }
 }
diff --git a/tests/unit/token_tests.rs b/tests/unit/token_tests.rs
index 682e02b..56f88b7 100644
--- a/tests/unit/token_tests.rs
+++ b/tests/unit/token_tests.rs
@@ -638,4 +638,46 @@ mod token_unit_tests {
             .expect("expected a typed contract error, not a host trap");
         assert_eq!(contract_err, learn_token::ContractError::AlreadyInitialized);
     }
+
+    #[test]
+    fn test_governance_proposal_lifecycle() {
+        let env = Env::default();
+        let (admin, contract_id, _) = setup_token(&env);
+        let client = LearnTokenClient::new(&env, &contract_id);
+        env.mock_all_auths();
+
+        let voter = Address::generate(&env);
+        client.mint(&admin, &voter, &1000);
+
+        let snapshot_ledger = env.ledger().sequence();
+        let proposal_id = client.create_proposal(
+            &SorobanString::from_str(&env, "Increase rewards"),
+            &2,
+            &0,
+            &1000,
+            &snapshot_ledger,
+        );
+
+        let proposal = client.get_proposal(&proposal_id).unwrap();
+        assert_eq!(proposal.choices, 2);
+        assert!(!proposal.executed);
+
+        // Voting power equals the voter's balance at the snapshot ledger.
+        assert_eq!(client.balance(&voter), 1000);
+
+        client.vote(&voter, &proposal_id, &0);
+
+        let after_vote = client.get_proposal(&proposal_id).unwrap();
+        assert_eq!(after_vote.vote_totals.get(0).unwrap(), 1000);
+
+        env.ledger().with_mut(|l| {
+            l.timestamp = 2000;
+        });
+
+        let winning_choice = client.execute_proposal(&proposal_id);
+        assert_eq!(winning_choice, 0);
+
+        let executed = client.get_proposal(&proposal_id).unwrap();
+        assert!(executed.executed);
+    }
 }