diff --git a/src/test/kotlin/tools/jackson/module/kotlin/DslTest.kt b/src/test/kotlin/tools/jackson/module/kotlin/DslTest.kt
index d428db81..3a6258a2 100644
--- a/src/test/kotlin/tools/jackson/module/kotlin/DslTest.kt
+++ b/src/test/kotlin/tools/jackson/module/kotlin/DslTest.kt
@@ -75,6 +75,6 @@ class DslTest {
         assertTrue(mapper.isEnabled(JsonReadFeature.ALLOW_JAVA_COMMENTS))
         assertFalse(mapper.isEnabled(JsonWriteFeature.QUOTE_PROPERTY_NAMES))
         assertTrue(mapper.isEnabled(JsonReadFeature.ALLOW_SINGLE_QUOTES))
-        assertTrue(mapper.registeredModules.any { it.moduleName == "tools.jackson.module.kotlin.KotlinModule" })
+        assertTrue(mapper.registeredModules.toList().any { it.moduleName == "tools.jackson.module.kotlin.KotlinModule" })
     }
 }
diff --git a/src/test/kotlin/tools/jackson/module/kotlin/KotlinModuleTest.kt b/src/test/kotlin/tools/jackson/module/kotlin/KotlinModuleTest.kt
index 6c381c0f..3a33ffb9 100644
--- a/src/test/kotlin/tools/jackson/module/kotlin/KotlinModuleTest.kt
+++ b/src/test/kotlin/tools/jackson/module/kotlin/KotlinModuleTest.kt
@@ -144,6 +144,6 @@ class KotlinModuleTest {
     @Test
     fun findAndRegisterModulesTest() {
         val mapper = JsonMapper.builder().findAndAddModules().build()
-        assertTrue(mapper.registeredModules.any { it is KotlinModule })
+        assertTrue(mapper.registeredModules.toList().any { it is KotlinModule })
     }
 }