diff --git a/kmath-ast/src/jsTest/kotlin/space/kscience/kmath/ast/utils.kt b/kmath-ast/src/jsTest/kotlin/space/kscience/kmath/ast/utils.kt
index c6b241e5c..7c397d5a0 100644
--- a/kmath-ast/src/jsTest/kotlin/space/kscience/kmath/ast/utils.kt
+++ b/kmath-ast/src/jsTest/kotlin/space/kscience/kmath/ast/utils.kt
@@ -3,8 +3,11 @@
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
+@file:OptIn(UnstableKMathAPI::class)
+
 package space.kscience.kmath.ast
 
+import space.kscience.kmath.UnstableKMathAPI
 import space.kscience.kmath.expressions.Expression
 import space.kscience.kmath.expressions.MST
 import space.kscience.kmath.expressions.Symbol
diff --git a/kmath-ast/src/jsTest/kotlin/space/kscience/kmath/wasm/TestWasmSpecific.kt b/kmath-ast/src/jsTest/kotlin/space/kscience/kmath/wasm/TestWasmSpecific.kt
index 0a85d5f24..132f9f1bd 100644
--- a/kmath-ast/src/jsTest/kotlin/space/kscience/kmath/wasm/TestWasmSpecific.kt
+++ b/kmath-ast/src/jsTest/kotlin/space/kscience/kmath/wasm/TestWasmSpecific.kt
@@ -5,6 +5,7 @@
 
 package space.kscience.kmath.wasm
 
+import space.kscience.kmath.UnstableKMathAPI
 import space.kscience.kmath.expressions.MstExtendedField
 import space.kscience.kmath.expressions.MstRing
 import space.kscience.kmath.expressions.invoke
@@ -15,6 +16,7 @@ import space.kscience.kmath.operations.invoke
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
+@OptIn(UnstableKMathAPI::class)
 internal class TestWasmSpecific {
     @Test
     fun int() {
diff --git a/kmath-kotlingrad/src/test/kotlin/space/kscience/kmath/kotlingrad/AdaptingTests.kt b/kmath-kotlingrad/src/test/kotlin/space/kscience/kmath/kotlingrad/AdaptingTests.kt
index 042777c8a..ccd89f063 100644
--- a/kmath-kotlingrad/src/test/kotlin/space/kscience/kmath/kotlingrad/AdaptingTests.kt
+++ b/kmath-kotlingrad/src/test/kotlin/space/kscience/kmath/kotlingrad/AdaptingTests.kt
@@ -6,6 +6,7 @@
 package space.kscience.kmath.kotlingrad
 
 import ai.hypergraph.kotlingrad.api.*
+import space.kscience.kmath.UnstableKMathAPI
 import space.kscience.kmath.asm.compileToExpression
 import space.kscience.kmath.ast.parseMath
 import space.kscience.kmath.expressions.MstNumericAlgebra
@@ -17,6 +18,7 @@ import kotlin.test.assertEquals
 import kotlin.test.assertTrue
 import kotlin.test.fail
 
+@OptIn(UnstableKMathAPI::class)
 internal class AdaptingTests {
     @Test
     fun symbol() {