diff --git a/homework/06-membership/readme.md b/homework/06-membership/readme.md
index 65cce24..c29a10e 100644
--- a/homework/06-membership/readme.md
+++ b/homework/06-membership/readme.md
@@ -101,7 +101,7 @@ distsys-membership [ЗДЕСЬ МОЖНО УКАЗАТЬ ОПЦИИ]
 | --- | --- | --- |
 | Обычный тест или один прогон CHAOS MONKEY | 15 секунд | `--test-timeout` |
 | Все прогоны CHAOS MONKEY вместе | 300 секунд | `--chaos-timeout` |
-| Обе фазы MODEL CHECKING вместе | 300 секунд | `--mc-timeout` |
+| Обе фазы MODEL CHECKING вместе | 450 секунд | `--mc-timeout` |
 | Каждый тест SCALABILITY | 60 секунд | `--scalability-timeout` |
 | Полный набор тестов | 540 секунд | `--suite-timeout` |
 
diff --git a/homework/06-membership/tests/src/main.rs b/homework/06-membership/tests/src/main.rs
index f1b8c05..ed37b30 100644
--- a/homework/06-membership/tests/src/main.rs
+++ b/homework/06-membership/tests/src/main.rs
@@ -62,7 +62,7 @@ struct Args {
     scalability_timeout: u64,
 
     /// Wall-clock limit in seconds for both model-checking phases
-    #[clap(long, default_value = "300", value_parser = clap::value_parser!(u64).range(1..=300))]
+    #[clap(long, default_value_t = tests_mc::MC_TIME_LIMIT_SECONDS, value_parser = clap::value_parser!(u64).range(1..=tests_mc::MC_TIME_LIMIT_SECONDS))]
     mc_timeout: u64,
 
     /// Total wall-clock budget in seconds (the Docker watchdog is 600s)
@@ -381,7 +381,11 @@ mod score_tests {
                 0.,
             ),
             (Some(Outcome::WorkerError("SIGKILL".into())), false, 0.),
-            (Some(Outcome::TimeLimit("MC budget".into())), true, 0.),
+            (
+                Some(Outcome::TimeLimit("test budget of 450s".into())),
+                true,
+                0.,
+            ),
             (
                 Some(Outcome::TimeLimit("suite budget after MC started".into())),
                 true,
diff --git a/homework/06-membership/tests/src/runner.rs b/homework/06-membership/tests/src/runner.rs
index 990e8a1..0f02c90 100644
--- a/homework/06-membership/tests/src/runner.rs
+++ b/homework/06-membership/tests/src/runner.rs
@@ -279,7 +279,12 @@ pub fn worker(args: &Args) {
         let mut outcome = match result {
             Ok(Ok(_)) => Outcome::Passed,
             Ok(Err(message))
-                if message == "time limit of 300s exceeded" && test.name == "MODEL CHECKING" =>
+                if test.name == "MODEL CHECKING"
+                    && message
+                        == format!(
+                            "time limit of {}s exceeded",
+                            crate::tests_mc::MC_TIME_LIMIT_SECONDS
+                        ) =>
             {
                 Outcome::TimeLimit(message)
             }
@@ -786,6 +791,33 @@ mod tests {
         }
     }
 
+    #[test]
+    fn mc_budget_is_450_seconds_with_the_same_suite_and_other_test_limits() {
+        let args = <Args as clap::Parser>::parse_from(["membership"]);
+        assert_eq!(args.mc_timeout, 450);
+        assert_eq!(args.suite_timeout, 540);
+        assert_eq!(args.chaos_timeout, 300);
+        for test in tests(&args) {
+            let expected = if test.name == "MODEL CHECKING" {
+                450
+            } else if test.name.starts_with("SCALABILITY") {
+                60
+            } else {
+                15
+            };
+            assert_eq!(seconds(&args, &test), expected, "{}", test.name);
+        }
+        assert!(
+            <Args as clap::Parser>::try_parse_from(["membership", "--mc-timeout", "450"]).is_ok()
+        );
+        for value in ["0", "451"] {
+            assert!(
+                <Args as clap::Parser>::try_parse_from(["membership", "--mc-timeout", value])
+                    .is_err()
+            );
+        }
+    }
+
     #[test]
     fn default_memory_limits_are_separate_for_mc_and_simulation() {
         let args = <Args as clap::Parser>::parse_from(["membership"]);
diff --git a/homework/06-membership/tests/src/tests_mc.rs b/homework/06-membership/tests/src/tests_mc.rs
index c6f2c6d..d2f3c6d 100644
--- a/homework/06-membership/tests/src/tests_mc.rs
+++ b/homework/06-membership/tests/src/tests_mc.rs
@@ -16,6 +16,8 @@ use anysystem::{Message, System};
 
 use crate::common::*;
 
+pub const MC_TIME_LIMIT_SECONDS: u64 = 450;
+
 pub fn test_mc_group(config: &TestConfig) -> TestResult {
     let mut rand = Pcg64::seed_from_u64(config.seed);
     let mut sys = build_system(config);
@@ -56,7 +58,9 @@ fn mc_explore_after_joins(sys: &mut System, seed_proc: String) -> Result<HashSet
             goals::depth_reached(20),
         ]))
         // Inner exploration safeguard; the supervisor also bounds both MC phases.
-        .invariant(invariants::time_limit(Duration::from_secs(300)))
+        .invariant(invariants::time_limit(Duration::from_secs(
+            MC_TIME_LIMIT_SECONDS,
+        )))
         // Collect states in which the group should be stabilized, namely:
         // either no events left, or every process received at least 3 messages.
         //