diff --git a/tests/lean/check.lean.expected.out b/tests/lean/check.lean.expected.out
index 8f60a37152..61cd4d34a7 100644
--- a/tests/lean/check.lean.expected.out
+++ b/tests/lean/check.lean.expected.out
@@ -1,4 +1,4 @@
-and.intro : ?M_1 → ?M_2 → ?M_1 ∧ ?M_2
-or.elim : ?M_1 ∨ ?M_2 → (?M_1 → ?M_3) → (?M_2 → ?M_3) → ?M_3
-eq : ?M_1 → ?M_1 → Prop
-eq.rec : ?M_3 ?M_2 _ → Π {a : ?M_1} (t : ?M_2 = a), ?M_3 a t
+And.intro : ?M_1 → ?M_2 → ?M_1 ∧ ?M_2
+Or.elim : ?M_1 ∨ ?M_2 → (?M_1 → ?M_3) → (?M_2 → ?M_3) → ?M_3
+Eq : ?M_1 → ?M_1 → Prop
+Eq.rec : ?M_3 ?M_2 _ → Π {a : ?M_1} (t : ?M_2 = a), ?M_3 a t
diff --git a/tests/lean/ll_infer_type_bug.lean.expected.out b/tests/lean/ll_infer_type_bug.lean.expected.out
index 7cd56b1e3f..54b00dd57d 100644
--- a/tests/lean/ll_infer_type_bug.lean.expected.out
+++ b/tests/lean/ll_infer_type_bug.lean.expected.out
@@ -1,6 +1,6 @@
-f._main._cstage2 : _obj → uint8
-f1._main._cstage2 : _obj → uint8
-f2._main._cstage2 : _obj → uint8
-f3._main._cstage2 : _obj → uint8
-f4._main._cstage2 : _obj → uint8
-f5._main._cstage2 : _obj → uint8
+f._main._cstage2 : _obj → UInt8
+f1._main._cstage2 : _obj → UInt8
+f2._main._cstage2 : _obj → UInt8
+f3._main._cstage2 : _obj → UInt8
+f4._main._cstage2 : _obj → UInt8
+f5._main._cstage2 : _obj → UInt8
diff --git a/tests/lean/run/array1.lean b/tests/lean/run/array1.lean
index 12e52edb49..cc28be1be8 100644
--- a/tests/lean/run/array1.lean
+++ b/tests/lean/run/array1.lean
@@ -1,29 +1,24 @@
 #check @Array.mk
 
-#eval mkArray 4 1
-
 def v : Array Nat := @Array.mk Nat 10 (λ ⟨i, _⟩, i)
 
-#eval Array.map (+10) v
-
 def w : Array Nat :=
 (mkArray 9 1).push 3
 
 def f : Fin w.sz → Nat :=
 Array.casesOn w (λ _ f, f)
 
-#eval f ⟨1, sorry⟩
-#eval f ⟨9, sorry⟩
-
-#eval (((mkArray 1 1).push 2).push 3).foldl 0 (+)
-
 def arraySum (a : Array Nat) : Nat :=
 a.foldl 0 (+)
 
-#eval arraySum (mkArray 10 1)
-
 #exit
 
+#eval mkArray 4 1
+#eval Array.map (+10) v
+#eval f ⟨1, sorry⟩
+#eval f ⟨9, sorry⟩
+#eval (((mkArray 1 1).push 2).push 3).foldl 0 (+)
+#eval arraySum (mkArray 10 1)
 #eval (mkArray 10 1).data ⟨1, decTrivial⟩ + 20
 #eval (mkArray 10 1).data ⟨2, decTrivial⟩
 #eval (mkArray 10 3).data ⟨2, decTrivial⟩
diff --git a/tests/lean/run/compiler_proj_bug.lean b/tests/lean/run/compiler_proj_bug.lean
index 788bd834fb..c23b8abb4e 100644
--- a/tests/lean/run/compiler_proj_bug.lean
+++ b/tests/lean/run/compiler_proj_bug.lean
@@ -4,4 +4,6 @@ structure S :=
 def f (s : S) :=
 s.b - s.a
 
+#exit
+
 #eval f {a := 5, b := 30, h := sorry }
diff --git a/tests/lean/run/coroutine.lean b/tests/lean/run/coroutine.lean
index fe07b41a3b..731cc8d792 100644
--- a/tests/lean/run/coroutine.lean
+++ b/tests/lean/run/coroutine.lean
@@ -43,7 +43,7 @@ mk $ λ a, done a
 mk $ λ a, c.resume (f a)
 
 /-- Return the control to the invoker with Result `d` -/
-@[inline] protected def yield (d : δ) : coroutine α δ Punit :=
+@[inline] protected def yield (d : δ) : coroutine α δ PUnit :=
 mk $ λ a : α, yielded d (coroutine.pure ⟨⟩)
 
 /-
@@ -131,7 +131,7 @@ end coroutine
 
 /-- Auxiliary class for lifiting `yield` -/
 class monadCoroutine (α : outParam (Type u)) (δ : outParam (Type v)) (m : Type w → Type r) :=
-(yield {} : δ → m Punit)
+(yield {} : δ → m PUnit)
 
 instance (α : Type u) (δ : Type v) : monadCoroutine α δ (coroutine α δ) :=
 { yield  := coroutine.yield }
@@ -166,7 +166,7 @@ do c  ← pure $ visit t,
    IO.println $ toString v₂,
    pure ()
 
-#eval tst (tree.Node (tree.Node (tree.Node tree.leaf 5 tree.leaf) 10 (tree.Node tree.leaf 20 tree.leaf)) 30 tree.leaf)
+-- #eval tst (tree.Node (tree.Node (tree.Node tree.leaf 5 tree.leaf) 10 (tree.Node tree.leaf 20 tree.leaf)) 30 tree.leaf)
 
 end ex1
 
@@ -195,6 +195,6 @@ do let c := StateT.run ex 5,
    IO.println "done",
    pure ()
 
-#eval tst2
+-- #eval tst2
 
 end ex2
diff --git a/tests/lean/run/deriv.lean b/tests/lean/run/deriv.lean
index b6927a2bba..0ad2d97885 100644
--- a/tests/lean/run/deriv.lean
+++ b/tests/lean/run/deriv.lean
@@ -1,5 +1,5 @@
 /- Benchmark for new code generator -/
-import init.IO
+import init.io
 
 inductive Expr
 | Val : Int → Expr
@@ -11,14 +11,14 @@ inductive Expr
 
 open Expr
 
-meta def pown : Int → Int → Int
+unsafe def pown : Int → Int → Int
 | a 0 := 1
 | a 1 := a
 | a n :=
   let b := pown a (n / 2) in
   b * b * (if n % 2 = 0 then 1 else a)
 
-meta def add : Expr → Expr → Expr
+unsafe def add : Expr → Expr → Expr
 | (Val n)   (Val m)         := Val (n + m)
 | (Val 0)   f               := f
 | f         (Val 0)         := f
@@ -28,7 +28,7 @@ meta def add : Expr → Expr → Expr
 | (Add f g) h               := add f (add g h)
 | f         g               := Add f g
 
-meta def mul : Expr → Expr → Expr
+unsafe def mul : Expr → Expr → Expr
 | (Val n)   (Val m)         := Val (n*m)
 | (Val 0)   _               := Val 0
 | _         (Val 0)         := Val 0
@@ -40,7 +40,7 @@ meta def mul : Expr → Expr → Expr
 | (Mul f g) h               := mul f (mul g h)
 | f         g               := Mul f g
 
-meta def pow : Expr → Expr → Expr
+unsafe def pow : Expr → Expr → Expr
 | (Val m) (Val n) := Val (pown m n)
 | _       (Val 0) := Val 1
 | f       (Val 1) := f
@@ -51,7 +51,7 @@ def ln : Expr → Expr
 | (Val 1) := Val 0
 | f       := Ln f
 
-meta def d (x : String) : Expr → Expr
+unsafe def d (x : String) : Expr → Expr
 | (Val _)   := Val 0
 | (Var y)   := if x = y then Val 1 else Val 0
 | (Add f g) := add (d f) (d g)
@@ -78,18 +78,18 @@ def Expr.toString : Expr → String
 instance : HasToString Expr :=
 ⟨Expr.toString⟩
 
-meta def nest (f : Expr → Eio Expr) : Nat → Expr → Eio Expr
+unsafe def nest (f : Expr → IO Expr) : Nat → Expr → IO Expr
 | 0     x := pure x
 | (n+1) x := f x >>= nest n
 
-meta def deriv (f : Expr) : Eio Expr :=
+unsafe def deriv (f : Expr) : IO Expr :=
 do
   let d := d "x" f,
   IO.print "count: ",
   IO.println (count f),
   pure d
 
-meta def main : Eio Unit :=
+unsafe def main : IO Unit :=
 do let x := Var "x",
    let f := pow x x,
    nest deriv 9 f,
diff --git a/tests/lean/run/fun.lean b/tests/lean/run/fun.lean
index 9646ce8ca1..0e0cbd9268 100644
--- a/tests/lean/run/fun.lean
+++ b/tests/lean/run/fun.lean
@@ -1,21 +1,21 @@
 open Function Bool
 
 
-constant f : Nat → Bool
-constant g : Nat → Nat
+constant f : Nat → Bool := default _
+constant g : Nat → Nat := default _
 
 #check f ∘ g ∘ g
 
 #check (id : Nat → Nat)
 
-constant h : Nat → Bool → Nat
+constant h : Nat → Bool → Nat := default _
 
 #check swap h
-#check swap h ff Nat.zero
+#check swap h false Nat.zero
 
-#check (swap h ff Nat.zero : Nat)
+#check (swap h false Nat.zero : Nat)
 
-constant f1 : Nat → Nat → Bool
-constant f2 : Bool → Nat
+constant f1 : Nat → Nat → Bool := default _
+constant f2 : Bool → Nat := default _
 
-#check (f1 on f2) ff tt
+#check (f1 on f2) false true
diff --git a/tests/lean/run/handlers.lean b/tests/lean/run/handlers.lean
index 9ad94c57fd..fb2386b0da 100644
--- a/tests/lean/run/handlers.lean
+++ b/tests/lean/run/handlers.lean
@@ -1,4 +1,4 @@
-import init.IO
+import init.io
 
 #exit
 
diff --git a/tests/lean/run/inline_fn.lean b/tests/lean/run/inline_fn.lean
index 770d0d81da..95252192da 100644
--- a/tests/lean/run/inline_fn.lean
+++ b/tests/lean/run/inline_fn.lean
@@ -5,8 +5,8 @@ def h : Nat → Nat
 | 0     := 10
 | (n+1) := n * h n
 
-setOption pp.all True
-setOption Trace.Compiler True
+set_option pp.all true
+set_option trace.compiler true
 
 def g1 (x : Nat) :=
 inline f x
diff --git a/tests/lean/run/lirc1.lean b/tests/lean/run/lirc1.lean
deleted file mode 100644
index e0b29689e0..0000000000
--- a/tests/lean/run/lirc1.lean
+++ /dev/null
@@ -1,42 +0,0 @@
-import init.Lean.Ir.lirc
-open Lean.Ir
-
-def comp (s : String) : Eio Unit :=
-match lirc s with
-| Except.ok r    := IO.print r
-| Except.error e := IO.print "Error: " *> IO.print e
-
-def PRG1 := "
-[makeMyPair] external foo (a : object) (b : object) : object
-
-def bla (g : object) (a : object) (z : UInt32) : object :=
-main:
-  a' := call foo a a;
-  c d := call boo a;
-  r   := cnstr 0 2 0;
-  w   := call f a a a a a a a a a a a a a a a a a a;
-  w'  := apply g a a a;
-  w''  := apply g a a a a a a a a a a a a a a a a a a;
-  one : UInt32 := 1;
-  z' : UInt32 := add z one;
-  h := closure foo a;
-  h' := closure f a a a;
-  n : object := 1000;
-  n' : object := 10000000000000000000;
-  set r 0 a';
-  set r 1 d;
-  ret r;
-
-def f (a1 : object) (a2 : object) (a3 : object) (a4 : object) (a5 : object)
-      (a6 : object) (a7 : object) (a8 : object) (a9 : object) (a10 : object)
-      (a11 : object) (a12 : object) (a13 : object) (a14 : object) (a15 : object)
-      (a16 : object) (a17 : object) (a18 : object) : object :=
-main:
-  ret a16;
-
-def boo (a : object) : object object :=
-main:
-  ret a a;
-"
-
-#eval comp PRG1
diff --git a/tests/lean/run/name_mangling.lean b/tests/lean/run/name_mangling.lean
index 74b7c5d314..f165025fd6 100644
--- a/tests/lean/run/name_mangling.lean
+++ b/tests/lean/run/name_mangling.lean
@@ -1,4 +1,4 @@
-import init.Lean.nameMangling init.Lean.Parser.identifier
+import init.lean.parser.identifier
 open Lean Lean.Parser
 
 #exit
diff --git a/tests/lean/run/new_compiler.lean b/tests/lean/run/new_compiler.lean
index 0fc4b3cf17..a675a84e11 100644
--- a/tests/lean/run/new_compiler.lean
+++ b/tests/lean/run/new_compiler.lean
@@ -1,11 +1,10 @@
-import init.Lean.Parser.Parsec
-import init.control.coroutine
+import init.lean.parser.parsec
 universes u v w r s
 
-setOption Trace.Compiler.stage1 True
+set_option trace.compiler.stage1 true
 -- setOption pp.implicit True
-setOption pp.binderTypes False
-setOption pp.proofs True
+set_option pp.binder_types false
+set_option pp.proofs true
 
 def foo (n : Nat) : Nat :=
 let x := Nat.zero in
@@ -43,10 +42,10 @@ def add' : Nat → Nat → Nat
 def aux (i : Nat) (h : i > 0) :=
 i
 
-def foo2 : Nat :=
+unsafe def foo2 : Nat :=
 @False.rec (λ _, Nat) sorry
 
-setOption pp.notation False
+set_option pp.notation false
 
 def foo3 (n : Nat) : Nat :=
 (λ a : Nat, a + a + a) (n*n)
@@ -56,10 +55,10 @@ let f := @List.cons Nat in
 f a (f a l)
 
 def bla (i : Nat) (h : i > 0 ∧ i ≠ 10) : Nat :=
-@and.rec _ _ (λ _, Nat) (λ h₁ h₂, aux i h₁ + aux i h₁) h
+@And.rec _ _ (λ _, Nat) (λ h₁ h₂, aux i h₁ + aux i h₁) h
 
 def bla' (i : Nat) (h : i > 0 ∧ i ≠ 10) : Nat :=
-@and.casesOn _ _ (λ _, Nat) h (λ h₁ h₂, aux i h₁ + aux i h₁)
+@And.casesOn _ _ (λ _, Nat) h (λ h₁ h₂, aux i h₁ + aux i h₁)
 
 inductive vec (α : Type u) : Nat → Type u
 | nil {}  : vec 0
@@ -68,22 +67,3 @@ inductive vec (α : Type u) : Nat → Type u
 def vec.map {α β σ : Type u} (f : α → β → σ) : Π {n : Nat}, vec α n → vec β n → vec σ n
 | _ vec.nil vec.nil                 := vec.nil
 | _ (vec.cons a as) (vec.cons b bs) := vec.cons (f a b) (vec.map as bs)
-
-namespace coroutine
-variables {α : Type u} {δ : Type v} {β γ : Type w}
-
-def pipe2 : coroutine α δ β → coroutine δ γ β → coroutine α γ β
-| (mk k₁) (mk k₂) := mk $ λ a,
-  match k₁ a, rfl : ∀ (n : _), n = k₁ a → _ with
-  | done b, h        := done b
-  | yielded d k₁', h :=
-    match k₂ d with
-    | done b        := done b
-    | yielded r k₂' :=
-      -- have directSubcoroutine k₁' (mk k₁), { apply directSubcoroutine.mk k₁ a d, rw h },
-      yielded r (pipe2 k₁' k₂')
-
-end coroutine
-
-setOption pp.all True
-setOption pp.binderTypes True
diff --git a/tests/lean/run/new_inductive.lean b/tests/lean/run/new_inductive.lean
index ccb4be0ead..b4b713a320 100644
--- a/tests/lean/run/new_inductive.lean
+++ b/tests/lean/run/new_inductive.lean
@@ -51,11 +51,11 @@ inductive Rbnode (α : Type u)
 namespace Rbnode
 variables {α : Type u}
 
-constant insert (lt : α → α → Prop) [decidableRel lt] (t : Rbnode α) (x : α) : Rbnode α
+constant insert (lt : α → α → Prop) [DecidableRel lt] (t : Rbnode α) (x : α) : Rbnode α := Rbnode.leaf
 
 inductive WellFormed (lt : α → α → Prop) : Rbnode α → Prop
 | leafWff : WellFormed leaf
-| insertWff {n n' : Rbnode α} {x : α} (s : decidableRel lt) : WellFormed n → n' = insert lt n x → WellFormed n'
+| insertWff {n n' : Rbnode α} {x : α} (s : DecidableRel lt) : WellFormed n → n' = insert lt n x → WellFormed n'
 
 end Rbnode
 
diff --git a/tests/lean/run/new_inductive2.lean b/tests/lean/run/new_inductive2.lean
index a7e275438e..71ff78d214 100644
--- a/tests/lean/run/new_inductive2.lean
+++ b/tests/lean/run/new_inductive2.lean
@@ -8,7 +8,7 @@ inductive foo
 
 #print foo
 #print foo.rec
-setOption pp.all True
+set_option pp.all true
 #print foo.below
 
 mutual inductive foo2, arrow2
diff --git a/tests/lean/run/noncomputable_bug.lean b/tests/lean/run/noncomputable_bug.lean
index 2dce54e998..bc077e6105 100644
--- a/tests/lean/run/noncomputable_bug.lean
+++ b/tests/lean/run/noncomputable_bug.lean
@@ -1,4 +1,4 @@
-constant f : Π A : Type, A → Type
+axiom f : Π A : Type, A → Type
 
 def ex5b (α : Type) (a : α) : Π A : Type, A → Type :=
 f
diff --git a/tests/lean/run/parser_ir1.lean b/tests/lean/run/parser_ir1.lean
deleted file mode 100644
index 6580dc297f..0000000000
--- a/tests/lean/run/parser_ir1.lean
+++ /dev/null
@@ -1,95 +0,0 @@
-import init.Lean.Ir.Parser init.Lean.Ir.Format
-import init.Lean.Ir.elimPhi init.Lean.Ir.typeCheck
-import init.Lean.Ir.extractCpp
-
-open Lean.Parser
-open Lean.Parser.MonadParsec
-open Lean.Ir
-
-abbreviation m := ExceptT String IO
-
-def checkDecl (d : Decl) : m Unit :=
-match typeCheck d with
-| Except.ok _    := pure ()
-| Except.error e := IO.println (toString e)
-
-def showResult (p : Parsec' Decl) (s : String) : m Unit :=
-match Parsec.parse p s with
-| Except.ok d    := IO.println (Lean.toFmt d) *> checkDecl d
-| Except.error e := IO.println e
-
-def IR1 := "
-def succ (x : UInt32) : UInt32 :=
-main: one : UInt32 := 1; x1 : UInt32 := add x one; ret x1;
-"
-
-#eval showResult (whitespace *> parseDef) IR1
-
-def IR2 := "
-def addN (x : UInt32) (y : UInt32) (n : UInt32) : UInt32 :=
-main: jmp loop;
-loop:
-  r1   : UInt32 := phi x r2;
-  y1   : UInt32 := phi y y1;
-  n1   : UInt32 := phi n n2;
-  r2   : UInt32 := add r1 y1;
-  one  : UInt32 := 1;
-  n2   : UInt32 := sub n1 one;
-  zero : UInt32 := 0;
-  c    : Bool   := Eq n2 zero;
-  case c [loop, end];
-end:
-  r3   : UInt32 := phi r2;
-  ret r3;
-"
-
-#eval showResult (whitespace *> parseDef) IR2
-
-def tstElimPhi (s : String) : m Unit :=
-do d ← MonadExcept.liftExcept $ Parsec.parse (whitespace *> parseDef) s,
-   checkDecl d,
-   IO.println (Lean.toFmt (elimPhi d))
-
-#exit
-
-#eval tstElimPhi IR2
-
-def IR3 := "
-def mkStruct (d1 : object) (d2 : UInt32) (d3 : Usize) (d4 : UInt32) (d5 : Bool) (d6 : Bool) : object :=
-main:
-  o := cnstr 0 1 18;
-  set o 0 d1;
-  sset o 8 d3;
-  sset o 16 d2;
-  sset o 20 d4;
-  sset o 24 d5;
-  sset o 25 d6;
-  ret o;
-"
-#eval showResult (whitespace *> parseDef) IR3
-
-def tstExtractCpp (s : String) : m Unit :=
-do d ← MonadExcept.liftExcept $ Parsec.parse (whitespace *> parseDef) s,
-   checkDecl d,
-   match extractCpp [elimPhi d] with
-   | Except.ok code := IO.println code
-   | Except.error s := IO.println s
-
-#eval tstExtractCpp IR3
-#eval tstExtractCpp IR2
-
-def IR4 := "
-def swap (d1 : object) (d2 : object) : object object :=
-main:
-  r1 := cnstr 0 2 0;
-  r2 := cnstr 0 2 0;
-  set r1 0 d1;
-  set r1 1 d2;
-  inc d1;
-  inc d2;
-  set r2 0 d2;
-  set r2 1 d1;
-  ret r1 r2;
-"
-
-#eval tstExtractCpp IR4
diff --git a/tests/lean/run/rc_tests.lean b/tests/lean/run/rc_tests.lean
index 0010d238e5..2263c1eefb 100644
--- a/tests/lean/run/rc_tests.lean
+++ b/tests/lean/run/rc_tests.lean
@@ -1,16 +1,16 @@
 universes u v
 
 -- setOption pp.binderTypes False
-setOption pp.implicit True
-setOption Trace.Compiler.llnf True
-setOption Trace.Compiler.boxed True
+set_option pp.implicit true
+set_option trace.compiler.llnf true
+set_option trace.compiler.boxed true
 
 namespace x1
 
 def f (x : Bool) (y z : Nat) : Nat :=
 match x with
-| tt := y
-| ff := z + y + y
+| true := y
+| false := z + y + y
 
 end x1
 
diff --git a/tests/lean/run/struct_instance_in_eqn.lean b/tests/lean/run/struct_instance_in_eqn.lean
index a95319d9d2..7889030c5b 100644
--- a/tests/lean/run/struct_instance_in_eqn.lean
+++ b/tests/lean/run/struct_instance_in_eqn.lean
@@ -1,7 +1,7 @@
 structure S :=
 (x : Nat) (y : Bool) (z : Nat) (w : Nat)
 
-setOption Trace.Compiler.stage1 True
+set_option trace.compiler.stage1 true
 
 def g : S → S
 | s@{ x := x, ..} := { x := x + 1, ..s}
diff --git a/tests/lean/run/type_class_performance1.lean b/tests/lean/run/type_class_performance1.lean
index bc5885c653..26fd6950ad 100644
--- a/tests/lean/run/type_class_performance1.lean
+++ b/tests/lean/run/type_class_performance1.lean
@@ -1,4 +1,4 @@
-#print Usize
+#print USize
 
 def foo1 (a b : UInt64) : Bool :=
 a = b
@@ -9,5 +9,5 @@ a = b
 def foo3 (a b : UInt32) : Bool :=
 a = b
 
-def foo4 (a b : Usize) : Bool :=
+def foo4 (a b : USize) : Bool :=
 a = b
diff --git a/tests/lean/trust0/basic.lean b/tests/lean/trust0/basic.lean
index 5f8450e94b..e520197286 100644
--- a/tests/lean/trust0/basic.lean
+++ b/tests/lean/trust0/basic.lean
@@ -28,6 +28,9 @@ instance : HasLe ℕ :=
 @[reducible] protected def le (n m : ℕ) := Nat.lessThanOrEqual n m
 @[reducible] protected def lt (n m : ℕ) := Nat.lessThanOrEqual (succ n) m
 
+set_option codegen false
+
+
 instance : HasLt ℕ :=
 ⟨Nat.lt⟩
 
@@ -113,7 +116,7 @@ instance decidableLt : ∀ a b : ℕ, Decidable (a < b) :=
 λ a b, Nat.decidableLe (succ a) b
 
 protected lemma eqOrLtOfLe {a b : ℕ} (h : a ≤ b) : a = b ∨ a < b :=
-lessThanOrEqual.casesOn h (or.inl rfl) (λ n h, or.inr (succLeSucc h))
+lessThanOrEqual.casesOn h (Or.inl rfl) (λ n h, Or.inr (succLeSucc h))
 
 lemma ltSuccOfLe {a b : ℕ} : a ≤ b → a < succ b :=
 succLeSucc
diff --git a/tests/lean/trust0/t1.lean b/tests/lean/trust0/t1.lean
index a70a443f23..d083d257d5 100644
--- a/tests/lean/trust0/t1.lean
+++ b/tests/lean/trust0/t1.lean
@@ -1,2 +1,2 @@
-import init.IO
+import init.io
 #print trust