diff --git a/utbot-framework/src/main/kotlin/org/utbot/framework/plugin/api/UtBotTestCaseGenerator.kt b/utbot-framework/src/main/kotlin/org/utbot/framework/plugin/api/UtBotTestCaseGenerator.kt
index 5ef2470615..dc1b7153d6 100644
--- a/utbot-framework/src/main/kotlin/org/utbot/framework/plugin/api/UtBotTestCaseGenerator.kt
+++ b/utbot-framework/src/main/kotlin/org/utbot/framework/plugin/api/UtBotTestCaseGenerator.kt
@@ -48,6 +48,7 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 import kotlinx.coroutines.yield
 import mu.KotlinLogging
+import org.utbot.engine.*
 import soot.Scene
 import soot.jimple.JimpleBody
 import soot.toolkits.graph.ExceptionalUnitGraph
@@ -403,7 +404,9 @@ object UtBotTestCaseGenerator : TestCaseGenerator {
         val signature = method.callable.signature
         val sootMethod = clazz.methods.singleOrNull { it.pureJavaSignature == signature }
             ?: error("No such $signature found")
-
+        if (!sootMethod.canRetrieveBody()) {
+            error("No method body for $sootMethod found")
+        }
         val methodBody = sootMethod.jimpleBody()
         val graph = methodBody.graph()
 
diff --git a/utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/ui/actions/GenerateTestsAction.kt b/utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/ui/actions/GenerateTestsAction.kt
index 7df71aa2f5..6b079e094f 100644
--- a/utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/ui/actions/GenerateTestsAction.kt
+++ b/utbot-intellij/src/main/kotlin/org/utbot/intellij/plugin/ui/actions/GenerateTestsAction.kt
@@ -58,6 +58,7 @@ class GenerateTestsAction : AnAction() {
             e.getData(CommonDataKeys.VIRTUAL_FILE_ARRAY)?.let {
                 srcClasses += getAllClasses(project, it)
             }
+            srcClasses.removeIf { it.isInterface }
             var commonSourceRoot = null as VirtualFile?
             for (srcClass in srcClasses) {
                 if (commonSourceRoot == null) {