diff --git a/utbot-framework/src/main/kotlin/org/utbot/framework/codegen/domain/Domain.kt b/utbot-framework/src/main/kotlin/org/utbot/framework/codegen/domain/Domain.kt
index 836f26faba..3b82df3436 100644
--- a/utbot-framework/src/main/kotlin/org/utbot/framework/codegen/domain/Domain.kt
+++ b/utbot-framework/src/main/kotlin/org/utbot/framework/codegen/domain/Domain.kt
@@ -256,6 +256,29 @@ abstract class TestFramework(
     }
 }
 
+class UnknownTestFramework(id: String) : TestFramework(id = id, displayName = id) {
+    override val mainPackage: String = id
+    override val assertionsClass: ClassId = ClassId(id)
+    override val arraysAssertionsClass: ClassId = ClassId(id)
+    override val kotlinFailureAssertionsClass: ClassId = ClassId(id)
+    override val testAnnotationId: ClassId = ClassId(id)
+    override val beforeMethodId: ClassId = ClassId(id)
+    override val afterMethodId: ClassId = ClassId(id)
+    override val parameterizedTestAnnotationId: ClassId = ClassId(id)
+    override val methodSourceAnnotationId: ClassId = ClassId(id)
+    override val nestedClassesShouldBeStatic: Boolean = false
+    override val argListClassId: ClassId = ClassId(id)
+
+    override fun getRunTestsCommand(
+        executionInvoke: String,
+        classPath: String,
+        classesNames: List<String>,
+        buildDirectory: String,
+        additionalArguments: List<String>
+    ): List<String> = emptyList()
+
+}
+
 object TestNg : TestFramework(id = "TestNG",displayName = "TestNG") {
     override val mainPackage: String = TEST_NG_PACKAGE
 
diff --git a/utbot-intellij-python/src/main/kotlin/org/utbot/intellij/plugin/language/python/PythonDialogWindow.kt b/utbot-intellij-python/src/main/kotlin/org/utbot/intellij/plugin/language/python/PythonDialogWindow.kt
index 5f6cb1a165..7f349c0cfd 100644
--- a/utbot-intellij-python/src/main/kotlin/org/utbot/intellij/plugin/language/python/PythonDialogWindow.kt
+++ b/utbot-intellij-python/src/main/kotlin/org/utbot/intellij/plugin/language/python/PythonDialogWindow.kt
@@ -16,6 +16,7 @@ import com.jetbrains.python.psi.PyClass
 import com.jetbrains.python.psi.PyFunction
 import org.utbot.framework.codegen.domain.ProjectType
 import org.utbot.framework.codegen.domain.TestFramework
+import org.utbot.intellij.plugin.language.python.settings.PythonTestFrameworkMapper
 import org.utbot.intellij.plugin.language.python.settings.loadStateFromModel
 import org.utbot.intellij.plugin.language.python.table.UtPyClassItem
 import org.utbot.intellij.plugin.language.python.table.UtPyFunctionItem
@@ -93,8 +94,9 @@ class PythonDialogWindow(val model: PythonTestsModel) : DialogWrapper(model.proj
     private fun initDefaultValues() {
         val settings = model.project.service<Settings>()
 
-        val installedTestFramework = TestFramework.allItems.singleOrNull { it.isInstalled }
-        currentFrameworkItem = installedTestFramework ?: settings.testFramework
+        val installedTestFramework = PythonTestFrameworkMapper.allItems.singleOrNull { it.isInstalled }
+        val testFramework = PythonTestFrameworkMapper.handleUnknown(settings.testFramework)
+        currentFrameworkItem = installedTestFramework ?: testFramework
 
         updateTestFrameworksList()
     }
diff --git a/utbot-intellij-python/src/main/kotlin/org/utbot/intellij/plugin/language/python/settings/PythonTestFrameworkMapper.kt b/utbot-intellij-python/src/main/kotlin/org/utbot/intellij/plugin/language/python/settings/PythonTestFrameworkMapper.kt
new file mode 100644
index 0000000000..57d8383441
--- /dev/null
+++ b/utbot-intellij-python/src/main/kotlin/org/utbot/intellij/plugin/language/python/settings/PythonTestFrameworkMapper.kt
@@ -0,0 +1,31 @@
+package org.utbot.intellij.plugin.language.python.settings
+
+import org.utbot.framework.codegen.domain.TestFramework
+import org.utbot.intellij.plugin.settings.TestFrameworkMapper
+import org.utbot.python.framework.codegen.PythonTestFrameworkManager
+import org.utbot.python.framework.codegen.model.Pytest
+import org.utbot.python.framework.codegen.model.Unittest
+
+object PythonTestFrameworkMapper: TestFrameworkMapper {
+    override fun toString(value: TestFramework): String = value.id
+
+    override fun fromString(value: String): TestFramework = when (value) {
+        Unittest.id -> Unittest
+        Pytest.id -> Pytest
+        else -> error("Unknown TestFramework $value")
+    }
+
+    override fun handleUnknown(testFramework: TestFramework): TestFramework {
+        if (allItems.contains(testFramework)) {
+            return testFramework
+        }
+        return try {
+            fromString(testFramework.id)
+        } catch (ex: IllegalStateException) {
+            defaultItem
+        }
+    }
+
+    val defaultItem: TestFramework get() = PythonTestFrameworkManager().defaultTestFramework
+    val allItems: List<TestFramework> get() = PythonTestFrameworkManager().testFrameworks
+}
\ No newline at end of file
diff --git a/utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/settings/JavaTestFrameworkMapper.kt b/utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/settings/JavaTestFrameworkMapper.kt
new file mode 100644
index 0000000000..e3aee633cf
--- /dev/null
+++ b/utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/settings/JavaTestFrameworkMapper.kt
@@ -0,0 +1,28 @@
+package org.utbot.intellij.plugin.settings
+
+import org.utbot.framework.codegen.domain.Junit4
+import org.utbot.framework.codegen.domain.Junit5
+import org.utbot.framework.codegen.domain.TestFramework
+import org.utbot.framework.codegen.domain.TestNg
+
+object JavaTestFrameworkMapper : TestFrameworkMapper {
+    override fun toString(value: TestFramework): String = value.id
+
+    override fun fromString(value: String): TestFramework = when (value) {
+        Junit4.id -> Junit4
+        Junit5.id -> Junit5
+        TestNg.id -> TestNg
+        else -> error("Unknown TestFramework $value")
+    }
+
+    override fun handleUnknown(testFramework: TestFramework): TestFramework {
+        if (TestFramework.allItems.contains(testFramework)) {
+            return testFramework
+        }
+        return try {
+            fromString(testFramework.id)
+        } catch (ex: IllegalStateException) {
+            TestFramework.defaultItem
+        }
+    }
+}
\ No newline at end of file
diff --git a/utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/ui/GenerateTestsDialogWindow.kt b/utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/ui/GenerateTestsDialogWindow.kt
index 185824a927..012d1814c6 100644
--- a/utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/ui/GenerateTestsDialogWindow.kt
+++ b/utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/ui/GenerateTestsDialogWindow.kt
@@ -114,6 +114,7 @@ import org.utbot.intellij.plugin.models.springBootTestLibraryDescriptor
 import org.utbot.intellij.plugin.models.springTestLibraryDescriptor
 import org.utbot.intellij.plugin.models.testNgNewLibraryDescriptor
 import org.utbot.intellij.plugin.models.testNgOldLibraryDescriptor
+import org.utbot.intellij.plugin.settings.JavaTestFrameworkMapper
 import org.utbot.intellij.plugin.settings.Settings
 import org.utbot.intellij.plugin.settings.loadStateFromModel
 import org.utbot.intellij.plugin.ui.components.CodeGenerationSettingItemRenderer
@@ -851,10 +852,11 @@ class GenerateTestsDialogWindow(val model: GenerateTestsModel) : DialogWrapper(m
         codegenLanguages.item = model.codegenLanguage
 
         val installedTestFramework = TestFramework.allItems.singleOrNull { it.isInstalled }
+        val testFramework = JavaTestFrameworkMapper.handleUnknown(settings.testFramework)
         currentFrameworkItem = when (parametrizedTestSources.isSelected) {
-            false -> installedTestFramework ?: settings.testFramework
+            false -> installedTestFramework ?: testFramework
             true -> installedTestFramework
-                ?: if (settings.testFramework != Junit4) settings.testFramework else TestFramework.parametrizedDefaultItem
+                ?: if (testFramework != Junit4) testFramework else TestFramework.parametrizedDefaultItem
         }
 
         springTestsType.item = if (isSpringConfigSelected()) settings.springTestsType else SpringTestsType.defaultItem
diff --git a/utbot-ui-commons/src/main/kotlin/org/utbot/intellij/plugin/settings/CommonSettings.kt b/utbot-ui-commons/src/main/kotlin/org/utbot/intellij/plugin/settings/CommonSettings.kt
index 3b33253091..edfec90095 100644
--- a/utbot-ui-commons/src/main/kotlin/org/utbot/intellij/plugin/settings/CommonSettings.kt
+++ b/utbot-ui-commons/src/main/kotlin/org/utbot/intellij/plugin/settings/CommonSettings.kt
@@ -36,6 +36,7 @@ import java.util.concurrent.CompletableFuture
 import kotlin.reflect.KClass
 import org.utbot.common.isWindows
 import org.utbot.framework.SummariesGenerationType
+import org.utbot.framework.codegen.domain.UnknownTestFramework
 import org.utbot.framework.plugin.api.SpringTestsType
 import org.utbot.framework.plugin.api.isSummarizationCompatible
 
@@ -252,13 +253,13 @@ class Settings(val project: Project) : PersistentStateComponent<Settings.State>
 
 // use it to serialize testFramework in State
 private class TestFrameworkConverter : Converter<TestFramework>() {
-    override fun toString(value: TestFramework): String = "$value"
+    override fun toString(value: TestFramework): String = value.id
 
     override fun fromString(value: String): TestFramework = when (value) {
         Junit4.id -> Junit4
         Junit5.id -> Junit5
         TestNg.id -> TestNg
-        else -> error("Unknown TestFramework $value")
+        else -> UnknownTestFramework(value)
     }
 }
 
diff --git a/utbot-ui-commons/src/main/kotlin/org/utbot/intellij/plugin/settings/TestFrameworkMapper.kt b/utbot-ui-commons/src/main/kotlin/org/utbot/intellij/plugin/settings/TestFrameworkMapper.kt
new file mode 100644
index 0000000000..79c290b82e
--- /dev/null
+++ b/utbot-ui-commons/src/main/kotlin/org/utbot/intellij/plugin/settings/TestFrameworkMapper.kt
@@ -0,0 +1,9 @@
+package org.utbot.intellij.plugin.settings
+
+import org.utbot.framework.codegen.domain.TestFramework
+
+interface TestFrameworkMapper {
+    fun toString(value: TestFramework): String
+    fun fromString(value: String): TestFramework
+    fun handleUnknown(testFramework: TestFramework): TestFramework
+}
\ No newline at end of file