diff --git a/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/TastyInterpreter.scala b/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/TastyInterpreter.scala
index 9eaf6c02dc9d..ba0c87ce5191 100644
--- a/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/TastyInterpreter.scala
+++ b/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/TastyInterpreter.scala
@@ -14,7 +14,7 @@ class TastyInterpreter extends TastyConsumer {
         case DefDef("main", _, _, _, Some(rhs)) =>
           val interpreter = new jvm.Interpreter(reflect)
 
-          interpreter.eval(rhs)(Map.empty)
+          interpreter.eval(rhs) with Map.empty
         // TODO: recurse only for PackageDef, ClassDef
         case tree =>
           super.traverseTree(tree)
@@ -22,4 +22,4 @@ class TastyInterpreter extends TastyConsumer {
     }
     Traverser.traverseTree(root)(reflect.rootContext)
   }
-}
\ No newline at end of file
+}
diff --git a/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/TreeInterpreter.scala b/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/TreeInterpreter.scala
index 8df8d08d65b2..3ce4283ff4f6 100644
--- a/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/TreeInterpreter.scala
+++ b/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/TreeInterpreter.scala
@@ -13,19 +13,19 @@ abstract class TreeInterpreter[R <: Reflection & Singleton](val reflect: R) {
   /** Representation of objects and values in the interpreter */
   type AbstractAny
 
-  type Result = implicit Env => AbstractAny
+  type Result = Env |=> AbstractAny
 
   def localValue(sym: Symbol)(implicit env: Env): LocalValue = env(sym)
 
-  def withLocalValue[T](sym: Symbol, value: LocalValue)(in: implicit Env => T)(implicit env: Env): T =
-    in(env.updated(sym, value))
+  def withLocalValue[T](sym: Symbol, value: LocalValue)(in: Env |=> T)(implicit env: Env): T =
+    in with env.updated(sym, value)
 
-  def withLocalValues[T](syms: List[Symbol], values: List[LocalValue])(in: implicit Env => T)(implicit env: Env): T =
-    in(env ++ syms.zip(values))
+  def withLocalValues[T](syms: List[Symbol], values: List[LocalValue])(in: Env |=> T)(implicit env: Env): T =
+    in with (env ++ syms.zip(values))
 
-  def interpretCall(instance: AbstractAny, sym: DefSymbol, args: List[AbstractAny]): Result = {
+  def interpretCall(inst: AbstractAny, sym: DefSymbol, args: List[AbstractAny]): Result = {
     // TODO
-    // withLocalValue(`this`, instance) {
+    // withLocalValue(`this`, inst) {
       val syms = sym.tree.paramss.headOption.getOrElse(Nil).map(_.symbol)
       withLocalValues(syms, args.map(LocalValue.valFrom(_))) {
         eval(sym.tree.rhs.get)
@@ -65,7 +65,7 @@ abstract class TreeInterpreter[R <: Reflection & Singleton](val reflect: R) {
   def interpretBlock(stats: List[Statement], expr: Term): Result = {
     val newEnv = stats.foldLeft(implicitly[Env])((accEnv, stat) => stat match {
       case ValDef(name, tpt, Some(rhs)) =>
-        def evalRhs = eval(rhs)(accEnv)
+        def evalRhs = eval(rhs) with accEnv
         val evalRef: LocalValue =
           if (stat.symbol.flags.is(Flags.Lazy)) LocalValue.lazyValFrom(evalRhs)
           else if (stat.symbol.flags.is(Flags.Mutable)) LocalValue.varFrom(evalRhs)
@@ -76,10 +76,10 @@ abstract class TreeInterpreter[R <: Reflection & Singleton](val reflect: R) {
         // TODO: record the environment for closure purposes
         accEnv
       case stat =>
-        eval(stat)(accEnv)
+        eval(stat) with accEnv
         accEnv
     })
-    eval(expr)(newEnv)
+    eval(expr) with newEnv
   }
 
   def interpretUnit(): AbstractAny
@@ -213,4 +213,4 @@ abstract class TreeInterpreter[R <: Reflection & Singleton](val reflect: R) {
       case _ => None
     }
   }
-}
\ No newline at end of file
+}
diff --git a/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/jvm/JVMReflection.scala b/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/jvm/JVMReflection.scala
index 3983dd298113..a18d76ea208f 100644
--- a/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/jvm/JVMReflection.scala
+++ b/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/jvm/JVMReflection.scala
@@ -47,22 +47,22 @@ class JVMReflection[R <: Reflection & Singleton](val reflect: R) {
   }
 
   def interpretStaticVal(moduleClass: Symbol, fn: Symbol): Object = {
-    val instance = loadModule(moduleClass)
+    val inst = loadModule(moduleClass)
     val name = fn.name
-    val method = getMethod(instance.getClass, name, Nil)
-    method.invoke(instance)
+    val method = getMethod(inst.getClass, name, Nil)
+    method.invoke(inst)
   }
 
   def interpretStaticMethodCall(moduleClass: Symbol, fn: Symbol, args: List[Object]): Object = {
     // TODO can we use interpretMethodCall instead?
-    val instance = loadModule(moduleClass)
-    val method = getMethod(instance.getClass, fn.name, paramsSig(fn))
-    method.invoke(instance, args: _*)
+    val inst = loadModule(moduleClass)
+    val method = getMethod(inst.getClass, fn.name, paramsSig(fn))
+    method.invoke(inst, args: _*)
   }
 
-  def interpretMethodCall(instance: Object, fn: Symbol, args: List[Object]): Object = {
-    val method = getMethod(instance.getClass, fn.name, paramsSig(fn))
-    method.invoke(instance, args: _*)
+  def interpretMethodCall(inst: Object, fn: Symbol, args: List[Object]): Object = {
+    val method = getMethod(inst.getClass, fn.name, paramsSig(fn))
+    method.invoke(inst, args: _*)
   }
 
   def interpretNew(fn: Symbol, args: List[Object]): Object = {
@@ -113,4 +113,4 @@ class JVMReflection[R <: Reflection & Singleton](val reflect: R) {
   }
 
   private def extraMsg = ". The most common reason for that is that you apply macros in the compilation run that defines them"
-}
\ No newline at end of file
+}