diff --git a/compiler/src/prog8/compiler/BeforeAsmGenerationAstChanger.kt b/compiler/src/prog8/compiler/BeforeAsmGenerationAstChanger.kt
index 1f33e5fea..7007462a9 100644
--- a/compiler/src/prog8/compiler/BeforeAsmGenerationAstChanger.kt
+++ b/compiler/src/prog8/compiler/BeforeAsmGenerationAstChanger.kt
@@ -249,8 +249,8 @@ internal class BeforeAsmGenerationAstChanger(val program: Program, private val o
         var rightAssignment: Assignment? = null
         var rightOperandReplacement: Expression? = null
 
-        val separateLeftExpr = !expr.left.isSimple && expr.left !is IFunctionCall
-        val separateRightExpr = !expr.right.isSimple && expr.right !is IFunctionCall
+        val separateLeftExpr = !expr.left.isSimple && expr.left !is IFunctionCall && expr.left !is ContainmentCheck
+        val separateRightExpr = !expr.right.isSimple && expr.right !is IFunctionCall && expr.right !is ContainmentCheck
         val leftDt = expr.left.inferType(program)
         val rightDt = expr.right.inferType(program)
 
diff --git a/docs/source/todo.rst b/docs/source/todo.rst
index 8ffbca86a..a735c6c0d 100644
--- a/docs/source/todo.rst
+++ b/docs/source/todo.rst
@@ -18,6 +18,7 @@ Future
 - fix the asm-labels problem (github issue #62)
 - make (an option) to let 64tass produce a listing file as well as output.
 - simplifyConditionalExpression() should not split expression if it still results in stack-based evaluation
+- simplifyConditionalExpression() sometimes introduces needless assignment to r9 tempvar
 - get rid of all TODO's in the code
 - improve testability further, add more tests
 - use more of Result<> and Either<> to handle errors/ nulls better
@@ -39,7 +40,8 @@ Future
 
 More code optimization ideas
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-- automatically convert if statements that test for multiple values (if X==1 or X==2..) to if X in [1,2,..] statements
+- automatically convert if statements that test for multiple values (if X==1 or X==2..) to if X in [1,2,..] statements, instead of just a warning
+-
 - byte typed expressions should be evaluated in the accumulator where possible, without (temp)var
    for instance  value = otherbyte >> 1   -->  lda otherbite ; lsr a; sta value
 - rewrite expression tree evaluation such that it doesn't use an eval stack but flatten the tree into linear code that uses a fixed number of predetermined value 'variables'
diff --git a/examples/test.p8 b/examples/test.p8
index e77c46cce..13f789996 100644
--- a/examples/test.p8
+++ b/examples/test.p8
@@ -1,127 +1,8 @@
 %import textio
 %zeropage basicsafe
 
-
 main {
     sub start() {
-        ubyte @shared xx
-        str name = "irmen"
-        ubyte[] values = [1,2,3,4,5]
-
-        if 1 in values {
-            txt.print("1 ok\n")
-        } else {
-            txt.print("1 err\n")
-        }
-        if 5 in values {
-            txt.print("7 ok\n")
-        } else {
-            txt.print("7 err\n")
-        }
-        if not(8 in values) {
-            txt.print("8 ok\n")
-        } else {
-            txt.print("8 err\n")
-        }
-
-        xx = 1
-        if xx in values {
-            txt.print("xx1 ok\n")
-        } else {
-            txt.print("xx1 err\n")
-        }
-        if xx in [1,3,5] {
-            txt.print("xx1b ok\n")
-        } else {
-            txt.print("xx1b err\n")
-        }
-        xx=5
-        if xx in values {
-            txt.print("xx7 ok\n")
-        } else {
-            txt.print("xx7 err\n")
-        }
-        if xx in [1,3,5] {
-            txt.print("xx7b ok\n")
-        } else {
-            txt.print("xx7b err\n")
-        }
-        xx=8
-        if not(xx in values) {
-            txt.print("xx8 ok\n")
-        } else {
-            txt.print("xx8 err\n")
-        }
-        if not(xx in [1,3,5]) {
-            txt.print("xx8b ok\n")
-        } else {
-            txt.print("xx8b err\n")
-        }
-
-        if xx==9 or xx==10 or xx==11 or xx==12 or xx==13 {
-            txt.print("9 10 11\n")
-        }
-
-        txt.print("\nthe end\n")
+        txt.nl()
     }
-
-    sub foobar() {
-        txt.print("foobar\n")
-    }
-
 }
-;
-;
-;main {
-;    ubyte @shared foo=99
-;      sub thing(uword rr) {
-;        ubyte @shared xx = rr[1]    ; should still work as var initializer that will be rewritten
-;        ubyte @shared yy
-;        yy = rr[2]
-;        uword @shared other
-;        ubyte @shared zz = other[3]
-;      }
-;    sub start() {
-;
-;        txt.print("should print:  10  40  80  20\n")
-;
-;        ubyte @shared xx
-;
-;        if xx >0
-;            goto $c000
-;        else
-;           xx++
-;labeltje:
-;
-;        repeat {
-;            xx++
-;            if xx==10
-;                break
-;        }
-;        txt.print_ub(xx)
-;        txt.nl()
-;
-;        while xx<50 {
-;            xx++
-;            if xx==40
-;                break
-;        }
-;        txt.print_ub(xx)
-;        txt.nl()
-;
-;        do {
-;            xx++
-;            if xx==80
-;                break
-;        } until xx>100
-;        txt.print_ub(xx)
-;        txt.nl()
-;
-;        for xx in 0 to 25 {
-;            if xx==20
-;                break
-;        }
-;        txt.print_ub(xx)
-;        txt.nl()
-;    }
-;}