diff --git a/compiler/testData/codegen/box/when/whenSubjectVariable/ieee754Equality.kt b/compiler/testData/codegen/box/when/whenSubjectVariable/ieee754Equality.kt
index 49e4b5678f2..860fbf9aa41 100644
--- a/compiler/testData/codegen/box/when/whenSubjectVariable/ieee754Equality.kt
+++ b/compiler/testData/codegen/box/when/whenSubjectVariable/ieee754Equality.kt
@@ -2,6 +2,7 @@
 // IGNORE_BACKEND: JS
 
 val dz = -0.0
+val fz = -0.0f
 
 fun box(): String {
     when (val y = dz) {
@@ -9,5 +10,24 @@ fun box(): String {
         else -> throw AssertionError()
     }
 
+    when (val y = dz) {
+        else -> {
+            if (y < 0.0) throw AssertionError()
+            if (y > 0.0) throw AssertionError()
+        }
+    }
+
+    when (val y = fz) {
+        0.0f -> {}
+        else -> throw AssertionError()
+    }
+
+    when (val y = fz) {
+        else -> {
+            if (y < 0.0f) throw AssertionError()
+            if (y > 0.0f) throw AssertionError()
+        }
+    }
+
     return "OK"
 }
\ No newline at end of file
diff --git a/compiler/testData/codegen/box/when/whenSubjectVariable/ieee754EqualityWithSmartCast.kt b/compiler/testData/codegen/box/when/whenSubjectVariable/ieee754EqualityWithSmartCast.kt
index 56dca102979..2dbaa088afd 100644
--- a/compiler/testData/codegen/box/when/whenSubjectVariable/ieee754EqualityWithSmartCast.kt
+++ b/compiler/testData/codegen/box/when/whenSubjectVariable/ieee754EqualityWithSmartCast.kt
@@ -2,6 +2,7 @@
 // IGNORE_BACKEND: JS
 
 val az: Any = -0.0
+val afz: Any = -0.0f
 
 fun box(): String {
     when (val y = az) {
@@ -10,5 +11,11 @@ fun box(): String {
         else -> throw AssertionError()
     }
 
+    when (val y = afz) {
+        !is Float -> throw AssertionError()
+        0.0 -> {}
+        else -> throw AssertionError()
+    }
+
     return "OK"
 }
\ No newline at end of file