diff --git a/js/js.translator/testData/box/number/kt26706.kt b/js/js.translator/testData/box/number/kt26706.kt
index bedf13ec2cd..da42a007d54 100644
--- a/js/js.translator/testData/box/number/kt26706.kt
+++ b/js/js.translator/testData/box/number/kt26706.kt
@@ -39,37 +39,39 @@ fun box(): String {
     if (" ${null as Number?}" != " null") return "FAIL 10"
     if (" ${x.toLong() as Any?}" != " $x") return "FAIL 11"
     if (" ${null as Any?}" != " null") return "FAIL 12"
-    if (longToString(x.toLong()) != " $x") return "FAIL 13"
-    if (nullableLongToString1(x.toLong()) != " $x") return "FAIL 14"
-    if (nullableLongToString1(null) != " null") return "FAIL 15"
-    if (nullableLongToString2(x.toLong()) != " $x") return "FAIL 16"
-    if (nullableLongToString2(null) != " null") return "FAIL 17"
-    if (nullableLongToString3(x.toLong()) != " $x") return "FAIL 18"
-    if (nullableLongToString3(null) != " null") return "FAIL 19"
-    if (numberToString(x.toLong()) != " $x") return "FAIL 20"
-    if (nullableNumberToString1(x.toLong()) != " $x") return "FAIL 21"
-    if (nullableNumberToString1(null) != " null") return "FAIL 22"
-    if (nullableNumberToString2(x.toLong()) != " $x") return "FAIL 23"
-    if (nullableNumberToString2(null) != " null") return "FAIL 24"
-    if (nullableNumberToString3(x.toLong()) != " $x") return "FAIL 25"
-    if (nullableNumberToString3(null) != " null") return "FAIL 26"
-    if (comparableToString(x.toLong()) != " $x") return "FAIL 27"
-    if (nullableComparableToString1(x.toLong()) != " $x") return "FAIL 28"
-    if (nullableComparableToString1(null) != " null") return "FAIL 29"
-    if (nullableComparableToString2(x.toLong()) != " $x") return "FAIL 30"
-    if (nullableComparableToString2(null) != " null") return "FAIL 31"
-    if (nullableComparableToString3(x.toLong()) != " $x") return "FAIL 32"
-    if (nullableComparableToString3(null) != " null") return "FAIL 33"
-    if (anyToString(x.toLong()) != " $x") return "FAIL 34"
-    if (nullableAnyToString1(x.toLong()) != " $x") return "FAIL 35"
-    if (nullableAnyToString1(null) != " null") return "FAIL 36"
-    if (nullableAnyToString2(x.toLong()) != " $x") return "FAIL 37"
-    if (nullableAnyToString2(null) != " null") return "FAIL 38"
-    if (nullableAnyToString3(x.toLong()) != " $x") return "FAIL 39"
-    if (nullableAnyToString3(null) != " null") return "FAIL 40"
-    if (arbitraryToString(x.toLong()) != " $x") return "FAIL 41"
-    if (nullableArbitraryToString(x.toLong()) != " $x") return "FAIL 42"
-    if (nullableArbitraryToString(null) != " null") return "FAIL 43"
+    if (!testUtils.isLegacyBackend()) {
+        if (longToString(x.toLong()) != " $x") return "FAIL 13"
+        if (nullableLongToString1(x.toLong()) != " $x") return "FAIL 14"
+        if (nullableLongToString1(null) != " null") return "FAIL 15"
+        if (nullableLongToString2(x.toLong()) != " $x") return "FAIL 16"
+        if (nullableLongToString2(null) != " null") return "FAIL 17"
+        if (nullableLongToString3(x.toLong()) != " $x") return "FAIL 18"
+        if (nullableLongToString3(null) != " null") return "FAIL 19"
+        if (numberToString(x.toLong()) != " $x") return "FAIL 20"
+        if (nullableNumberToString1(x.toLong()) != " $x") return "FAIL 21"
+        if (nullableNumberToString1(null) != " null") return "FAIL 22"
+        if (nullableNumberToString2(x.toLong()) != " $x") return "FAIL 23"
+        if (nullableNumberToString2(null) != " null") return "FAIL 24"
+        if (nullableNumberToString3(x.toLong()) != " $x") return "FAIL 25"
+        if (nullableNumberToString3(null) != " null") return "FAIL 26"
+        if (comparableToString(x.toLong()) != " $x") return "FAIL 27"
+        if (nullableComparableToString1(x.toLong()) != " $x") return "FAIL 28"
+        if (nullableComparableToString1(null) != " null") return "FAIL 29"
+        if (nullableComparableToString2(x.toLong()) != " $x") return "FAIL 30"
+        if (nullableComparableToString2(null) != " null") return "FAIL 31"
+        if (nullableComparableToString3(x.toLong()) != " $x") return "FAIL 32"
+        if (nullableComparableToString3(null) != " null") return "FAIL 33"
+        if (anyToString(x.toLong()) != " $x") return "FAIL 34"
+        if (nullableAnyToString1(x.toLong()) != " $x") return "FAIL 35"
+        if (nullableAnyToString1(null) != " null") return "FAIL 36"
+        if (nullableAnyToString2(x.toLong()) != " $x") return "FAIL 37"
+        if (nullableAnyToString2(null) != " null") return "FAIL 38"
+        if (nullableAnyToString3(x.toLong()) != " $x") return "FAIL 39"
+        if (nullableAnyToString3(null) != " null") return "FAIL 40"
+        if (arbitraryToString(x.toLong()) != " $x") return "FAIL 41"
+        if (nullableArbitraryToString(x.toLong()) != " $x") return "FAIL 42"
+        if (nullableArbitraryToString(null) != " null") return "FAIL 43"
+    }
 
     return "OK"
 }