diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e7019f3f8..0c0d3940e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -41,6 +41,7 @@ jobs:
         with:
           toolchain: ${{ matrix.rust }}
           components: rustfmt, clippy
+      - uses: taiki-e/install-action@nextest
       - uses: actions/cache@v4
         with:
           path: |
@@ -58,7 +59,7 @@ jobs:
       - name: Clippy
         run: cargo clippy --workspace --all-features --all-targets -- -D warnings
       - name: Test
-        run: cargo test --workspace --all-features --all-targets
+        run: cargo nextest run --workspace --all-features --all-targets --no-fail-fast
       - name: Test docs
         run: cargo test --workspace --all-features --doc
       - name: Check (without default features)
@@ -73,6 +74,7 @@ jobs:
       - name: Install Miri
         uses: dtolnay/rust-toolchain@miri
         id: rust-toolchain
+      - uses: taiki-e/install-action@nextest
       - uses: actions/cache@v4
         with:
           path: |
@@ -89,12 +91,11 @@ jobs:
       - name: Setup Miri
         run: cargo miri setup
       - name: Test with Miri
-        run: cargo miri test --no-fail-fast --all-features
+        run: cargo miri nextest run --all-features --no-fail-fast --tests
         env:
           MIRIFLAGS: -Zmiri-disable-isolation -Zmiri-retag-fields
       - name: Run examples with Miri
-        run: |
-          cargo miri run --example calc
+        run: cargo miri run --example calc
 
   benchmarks:
     # https://github.com/CodSpeedHQ/action/issues/126
diff --git a/benches/dataflow.rs b/benches/dataflow.rs
index d535046e9..dc419a0ea 100644
--- a/benches/dataflow.rs
+++ b/benches/dataflow.rs
@@ -7,6 +7,8 @@ use salsa::{CycleRecoveryAction, Database as Db, Setter};
 use std::collections::BTreeSet;
 use std::iter::IntoIterator;
 
+include!("shims/global_alloc_overwrite.rs");
+
 /// A Use of a symbol.
 #[salsa::input]
 struct Use {
diff --git a/examples/calc/type_check.rs b/examples/calc/type_check.rs
index e5bbba6b8..dd5b963f9 100644
--- a/examples/calc/type_check.rs
+++ b/examples/calc/type_check.rs
@@ -108,7 +108,7 @@ impl<'db> CheckExpression<'_, 'db> {
 fn check_string(
     source_text: &str,
     expected_diagnostics: expect_test::Expect,
-    edits: &[(&str, expect_test::Expect, expect_test::Expect)],
+    edits: &[(&str, expect_test::Expect)],
 ) {
     use salsa::{Database, Setter};
 
@@ -135,11 +135,8 @@ fn check_string(
         expected_diagnostics.assert_eq(&rendered_diagnostics);
     });
 
-    // Clear logs
-    db.take_logs();
-
     // Apply edits and check diagnostics/logs after each one
-    for (new_source_text, expected_diagnostics, expected_logs) in edits {
+    for (new_source_text, expected_diagnostics) in edits {
         source_program
             .set_text(&mut db)
             .to(new_source_text.to_string());
@@ -149,8 +146,6 @@ fn check_string(
             expected_diagnostics
                 .assert_debug_eq(&type_check_program::accumulated::<Diagnostic>(db, program));
         });
-
-        expected_logs.assert_debug_eq(&db.take_logs());
     }
 }
 
@@ -267,12 +262,6 @@ fn fix_bad_variable_in_function() {
             expect![[r#"
                 []
             "#]],
-            expect![[r#"
-                [
-                    "Event: Event { thread_id: ThreadId(11), kind: WillExecute { database_key: parse_statements(Id(0)) } }",
-                    "Event: Event { thread_id: ThreadId(11), kind: WillExecute { database_key: type_check_function(Id(1800)) } }",
-                ]
-            "#]],
         )],
     );
 }
diff --git a/src/revision.rs b/src/revision.rs
index 43995f173..f71fc29ca 100644
--- a/src/revision.rs
+++ b/src/revision.rs
@@ -126,7 +126,7 @@ mod tests {
     use super::*;
 
     #[test]
-    fn pptional_atomic_revision() {
+    fn optional_atomic_revision() {
         let val = OptionalAtomicRevision::new(Some(Revision::start()));
         assert_eq!(val.load(), Some(Revision::start()));
         assert_eq!(val.swap(None), Some(Revision::start()));
diff --git a/tests/cycle.rs b/tests/cycle.rs
index fe5875fc0..7f17034f6 100644
--- a/tests/cycle.rs
+++ b/tests/cycle.rs
@@ -6,6 +6,7 @@ mod common;
 use common::{ExecuteValidateLoggerDatabase, LogDatabase};
 use expect_test::expect;
 use salsa::{CycleRecoveryAction, Database as Db, DatabaseImpl as DbImpl, Durability, Setter};
+#[cfg(not(miri))]
 use test_log::test;
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, salsa::Update)]
@@ -31,12 +32,13 @@ impl Value {
 /// `max_iterate`, `min_panic`, `max_panic`) for testing cycle behaviors.
 #[salsa::input]
 struct Inputs {
+    #[return_ref]
     inputs: Vec<Input>,
 }
 
 impl Inputs {
     fn values(self, db: &dyn Db) -> impl Iterator<Item = Value> + '_ {
-        self.inputs(db).into_iter().map(|input| input.eval(db))
+        self.inputs(db).iter().map(|input| input.eval(db))
     }
 }
 
@@ -69,8 +71,8 @@ enum Input {
 }
 
 impl Input {
-    fn eval(self, db: &dyn Db) -> Value {
-        match self {
+    fn eval(&self, db: &dyn Db) -> Value {
+        match *self {
             Self::Value(value) => value,
             Self::UntrackedRead(value) => {
                 db.report_untracked_read();
@@ -80,30 +82,30 @@ impl Input {
             Self::MaxIterate(inputs) => max_iterate(db, inputs),
             Self::MinPanic(inputs) => min_panic(db, inputs),
             Self::MaxPanic(inputs) => max_panic(db, inputs),
-            Self::Successor(input) => match input.eval(db) {
+            Self::Successor(ref input) => match input.eval(db) {
                 Value::N(num) => Value::N(num + 1),
                 other => other,
             },
-            Self::SuccessorOrZero(input) => match input.eval(db) {
+            Self::SuccessorOrZero(ref input) => match input.eval(db) {
                 Value::N(num) => Value::N(num + 1),
                 _ => Value::N(0),
             },
         }
     }
 
-    fn assert(self, db: &dyn Db, expected: Value) {
+    fn assert(&self, db: &dyn Db, expected: Value) {
         assert_eq!(self.eval(db), expected)
     }
 
-    fn assert_value(self, db: &dyn Db, expected: u8) {
+    fn assert_value(&self, db: &dyn Db, expected: u8) {
         self.assert(db, Value::N(expected))
     }
 
-    fn assert_bounds(self, db: &dyn Db) {
+    fn assert_bounds(&self, db: &dyn Db) {
         self.assert(db, Value::OutOfBounds)
     }
 
-    fn assert_count(self, db: &dyn Db) {
+    fn assert_count(&self, db: &dyn Db) {
         self.assert(db, Value::TooManyIterations)
     }
 }
@@ -734,7 +736,7 @@ fn cycle_becomes_non_cycle() {
     a_in.set_inputs(&mut db).to(vec![b]);
     b_in.set_inputs(&mut db).to(vec![a.clone()]);
 
-    a.clone().assert_value(&db, 255);
+    a.assert_value(&db, 255);
 
     b_in.set_inputs(&mut db).to(vec![value(30)]);
 
@@ -758,7 +760,7 @@ fn non_cycle_becomes_cycle() {
     a_in.set_inputs(&mut db).to(vec![b]);
     b_in.set_inputs(&mut db).to(vec![value(30)]);
 
-    a.clone().assert_value(&db, 30);
+    a.assert_value(&db, 30);
 
     b_in.set_inputs(&mut db).to(vec![a.clone()]);
 
@@ -790,7 +792,7 @@ fn nested_double_multiple_revisions() {
         Input::Successor(Box::new(b.clone())),
     ]);
 
-    a.clone().assert_count(&db);
+    a.assert_count(&db);
 
     // next revision, we hit max value instead
     c_in.set_inputs(&mut db).to(vec![
@@ -799,13 +801,13 @@ fn nested_double_multiple_revisions() {
         Input::Successor(Box::new(b.clone())),
     ]);
 
-    a.clone().assert_bounds(&db);
+    a.assert_bounds(&db);
 
     // and next revision, we converge
     c_in.set_inputs(&mut db)
         .to(vec![value(240), a.clone(), b.clone()]);
 
-    a.clone().assert_value(&db, 240);
+    a.assert_value(&db, 240);
 
     // one more revision, without relevant changes
     a_in.set_inputs(&mut db).to(vec![b]);
@@ -838,7 +840,7 @@ fn cycle_durability() {
         .with_durability(Durability::HIGH)
         .to(vec![a.clone()]);
 
-    a.clone().assert_value(&db, 255);
+    a.assert_value(&db, 255);
 
     // next revision, we converge instead
     a_in.set_inputs(&mut db)
@@ -866,8 +868,8 @@ fn cycle_unchanged() {
     b_in.set_inputs(&mut db).to(vec![value(60), c]);
     c_in.set_inputs(&mut db).to(vec![b.clone()]);
 
-    a.clone().assert_value(&db, 59);
-    b.clone().assert_value(&db, 60);
+    a.assert_value(&db, 59);
+    b.assert_value(&db, 60);
 
     db.assert_logs_len(4);
 
@@ -912,8 +914,8 @@ fn cycle_unchanged_nested() {
         .to(vec![value(61), b.clone(), e.clone()]);
     e_in.set_inputs(&mut db).to(vec![d.clone()]);
 
-    a.clone().assert_value(&db, 59);
-    b.clone().assert_value(&db, 60);
+    a.assert_value(&db, 59);
+    b.assert_value(&db, 60);
 
     db.assert_logs_len(10);
 
@@ -965,8 +967,8 @@ fn cycle_unchanged_nested_intertwined() {
             .to(vec![value(61), b.clone(), e.clone()]);
         e_in.set_inputs(&mut db).to(vec![d.clone()]);
 
-        a.clone().assert_value(&db, 59);
-        b.clone().assert_value(&db, 60);
+        a.assert_value(&db, 59);
+        b.assert_value(&db, 60);
 
         // First time we run this test, don't fetch c/d/e here; this means they won't get marked
         // `verified_final` in R6 (this revision), which will leave us in the next revision (R7)
@@ -977,9 +979,9 @@ fn cycle_unchanged_nested_intertwined() {
         // Second time we run this test, fetch everything in R6, to check the behavior of
         // `maybe_changed_after` with all validated-final memos.
         if i == 1 {
-            c.clone().assert_value(&db, 60);
-            d.clone().assert_value(&db, 60);
-            e.clone().assert_value(&db, 60);
+            c.assert_value(&db, 60);
+            d.assert_value(&db, 60);
+            e.assert_value(&db, 60);
         }
 
         db.assert_logs_len(16 + i);
diff --git a/tests/lru.rs b/tests/lru.rs
index c60e559f3..5e306a821 100644
--- a/tests/lru.rs
+++ b/tests/lru.rs
@@ -36,7 +36,7 @@ struct MyInput {
     field: u32,
 }
 
-#[salsa::tracked(lru = 32)]
+#[salsa::tracked(lru = 8)]
 fn get_hot_potato(db: &dyn LogDatabase, input: MyInput) -> Arc<HotPotato> {
     db.push_log(format!("get_hot_potato({:?})", input.field(db)));
     Arc::new(HotPotato::new(input.field(db)))
@@ -57,16 +57,16 @@ fn lru_works() {
     let mut db = common::LoggerDatabase::default();
     assert_eq!(load_n_potatoes(), 0);
 
-    for i in 0..128u32 {
+    for i in 0..32u32 {
         let input = MyInput::new(&db, i);
         let p = get_hot_potato(&db, input);
         assert_eq!(p.0, i);
     }
 
-    assert_eq!(load_n_potatoes(), 128);
+    assert_eq!(load_n_potatoes(), 32);
     // trigger the GC
     db.synthetic_write(salsa::Durability::HIGH);
-    assert_eq!(load_n_potatoes(), 32);
+    assert_eq!(load_n_potatoes(), 8);
 }
 
 #[test]
@@ -74,42 +74,42 @@ fn lru_can_be_changed_at_runtime() {
     let mut db = common::LoggerDatabase::default();
     assert_eq!(load_n_potatoes(), 0);
 
-    let inputs: Vec<(u32, MyInput)> = (0..128).map(|i| (i, MyInput::new(&db, i))).collect();
+    let inputs: Vec<(u32, MyInput)> = (0..32).map(|i| (i, MyInput::new(&db, i))).collect();
 
     for &(i, input) in inputs.iter() {
         let p = get_hot_potato(&db, input);
         assert_eq!(p.0, i);
     }
 
-    assert_eq!(load_n_potatoes(), 128);
+    assert_eq!(load_n_potatoes(), 32);
     // trigger the GC
     db.synthetic_write(salsa::Durability::HIGH);
-    assert_eq!(load_n_potatoes(), 32);
+    assert_eq!(load_n_potatoes(), 8);
 
-    get_hot_potato::set_lru_capacity(&mut db, 64);
-    assert_eq!(load_n_potatoes(), 32);
+    get_hot_potato::set_lru_capacity(&mut db, 16);
+    assert_eq!(load_n_potatoes(), 8);
     for &(i, input) in inputs.iter() {
         let p = get_hot_potato(&db, input);
         assert_eq!(p.0, i);
     }
 
-    assert_eq!(load_n_potatoes(), 128);
+    assert_eq!(load_n_potatoes(), 32);
     // trigger the GC
     db.synthetic_write(salsa::Durability::HIGH);
-    assert_eq!(load_n_potatoes(), 64);
+    assert_eq!(load_n_potatoes(), 16);
 
     // Special case: setting capacity to zero disables LRU
     get_hot_potato::set_lru_capacity(&mut db, 0);
-    assert_eq!(load_n_potatoes(), 64);
+    assert_eq!(load_n_potatoes(), 16);
     for &(i, input) in inputs.iter() {
         let p = get_hot_potato(&db, input);
         assert_eq!(p.0, i);
     }
 
-    assert_eq!(load_n_potatoes(), 128);
+    assert_eq!(load_n_potatoes(), 32);
     // trigger the GC
     db.synthetic_write(salsa::Durability::HIGH);
-    assert_eq!(load_n_potatoes(), 128);
+    assert_eq!(load_n_potatoes(), 32);
 
     drop(db);
     assert_eq!(load_n_potatoes(), 0);
@@ -118,10 +118,10 @@ fn lru_can_be_changed_at_runtime() {
 #[test]
 fn lru_keeps_dependency_info() {
     let mut db = common::LoggerDatabase::default();
-    let capacity = 32;
+    let capacity = 8;
 
     // Invoke `get_hot_potato2` 33 times. This will (in turn) invoke
-    // `get_hot_potato`, which will trigger LRU after 32 executions.
+    // `get_hot_potato`, which will trigger LRU after 8 executions.
     let inputs: Vec<MyInput> = (0..(capacity + 1))
         .map(|i| MyInput::new(&db, i as u32))
         .collect();
diff --git a/tests/parallel/cycle_ab_peeping_c.rs b/tests/parallel/cycle_ab_peeping_c.rs
index 1c8233fab..cff533e39 100644
--- a/tests/parallel/cycle_ab_peeping_c.rs
+++ b/tests/parallel/cycle_ab_peeping_c.rs
@@ -15,8 +15,8 @@ use crate::setup::{Knobs, KnobsDatabase};
 struct CycleValue(u32);
 
 const MIN: CycleValue = CycleValue(0);
-const MID: CycleValue = CycleValue(11);
-const MAX: CycleValue = CycleValue(22);
+const MID: CycleValue = CycleValue(5);
+const MAX: CycleValue = CycleValue(10);
 
 #[salsa::tracked(cycle_fn=cycle_fn, cycle_initial=cycle_initial)]
 fn query_a(db: &dyn KnobsDatabase) -> CycleValue {
diff --git a/tests/tracked_struct_disambiguates.rs b/tests/tracked_struct_disambiguates.rs
index 80d8e9a15..663fedf42 100644
--- a/tests/tracked_struct_disambiguates.rs
+++ b/tests/tracked_struct_disambiguates.rs
@@ -85,10 +85,7 @@ fn execute() {
     let mut db = salsa::DatabaseImpl::new();
     let inputs = MyInputs::new(
         &db,
-        (0..1024)
-            .into_iter()
-            .map(|i| MyInput::new(&db, i))
-            .collect(),
+        (0..64).into_iter().map(|i| MyInput::new(&db, i)).collect(),
     );
     let trackeds = batch(&db, inputs);
     for (id, tracked) in trackeds.into_iter().enumerate() {