Looks like the type inference is what causes issue

Author: fmonniot

core/src/test/scala/eu/monniot/scala3mock/mock/MockSuite.scala

@@ -80,8 +80,8 @@ class MockSuite extends munit.FunSuite with MockFunctions {
 
       // Polymorphic methods
       // Fail to compile with 3.3.0
-      //when(m.polymorphic _).expects(List(2)).returns("a1")
-      //assertEquals(m.polymorphic(List(2)), "a1")
+      when[List[Int], String](m.polymorphic).expects(List(2)).returns("a1")
+      assertEquals(m.polymorphic(List(2)), "a1")
 
       val javaObject = Object()
       when(() => m.polymorphicUnary).expects().returns(javaObject)
@@ -91,8 +91,8 @@ class MockSuite extends munit.FunSuite with MockFunctions {
       assertEquals(m.polycurried("a")(2), "c" -> 6)
 
       // Fail to compile with 3.3.0
-      //when(m.polymorphicParam).expects((1, 2.0)).returns("ok")
-      //assertEquals(m.polymorphicParam((1, 2.0)), "ok")
+      when[(Int, Double), String](m.polymorphicParam).expects((1, 2.0)).returns("ok")
+      assertEquals(m.polymorphicParam((1, 2.0)), "ok")
 
 
       // TODO Not supported yet
@@ -103,15 +103,13 @@ class MockSuite extends munit.FunSuite with MockFunctions {
       // Scala 3 to let us do that.
 
       // type bound methods
-      // Fail to compile with 3.3.0
-      //when(m.upperBound _).expects(TestException()).returns(1)
-      //assertEquals(m.upperBound(TestException()), 1)
+      when[TestException, Int](m.upperBound _).expects(TestException()).returns(1)
+      assertEquals(m.upperBound(TestException()), 1)
 
       val animal = Animal()
       val dog = Dog()
-      // Fail to compile with 3.3.0
-      //when(m.lowerBound).expects(animal, List(dog)).returns("ok")
-      //assertEquals(m.lowerBound(animal, List(dog)), "ok")
+      when[Animal, List[Animal], String](m.lowerBound).expects(animal, List(dog)).returns("ok")
+      assertEquals(m.lowerBound(animal, List(dog)), "ok")
 
       // TODO with implementation methods
 

scalatest/src/test/scala/eu/monniot/scala3mock/scalatest/ErrorReportingTest.scala

@@ -97,8 +97,7 @@ class ErrorReportingTest
 
       test("execute block of code") {
         val mockedTrait = mock[TestTrait]
-        // Fail to compile with 3.3.0
-        //when(mockedTrait.polymorphicMethod).expects(List(1)).returning("one")
+        when[List[Int], String](mockedTrait.polymorphicMethod).expects(List(1)).returning("one")
 
         suiteScopeMock.noParamMethod()
         mockedTrait.oneParamMethod(3)