diff --git a/utbot-intellij-python/src/main/kotlin/org/utbot/intellij/plugin/language/python/PythonDialogProcessor.kt b/utbot-intellij-python/src/main/kotlin/org/utbot/intellij/plugin/language/python/PythonDialogProcessor.kt
index f8384e9d3d..ba1494ccde 100644
--- a/utbot-intellij-python/src/main/kotlin/org/utbot/intellij/plugin/language/python/PythonDialogProcessor.kt
+++ b/utbot-intellij-python/src/main/kotlin/org/utbot/intellij/plugin/language/python/PythonDialogProcessor.kt
@@ -286,10 +286,18 @@ fun getDirectoriesForSysPath(
             if (element != null) {
                 val directory = element.parent
                 if (directory is PsiDirectory) {
-                    sources.add(directory.virtualFile)
+                    if (sources.any { source ->
+                            val sourcePath = source.canonicalPath
+                            if (source.isDirectory && sourcePath != null) {
+                                directory.virtualFile.canonicalPath?.startsWith(sourcePath) ?: false
+                            } else {
+                                false
+                            }
+                        }) {
+                        sources.add(directory.virtualFile)
+                    }
                 }
             }
-
         }
     }
 
@@ -298,7 +306,7 @@ fun getDirectoriesForSysPath(
         importPath += "."
 
     return Pair(
-        sources.map { it.path }.toSet(),
+        sources.map { it.path.replace("\\", "\\\\") }.toSet(),
         "${importPath}${file.name}".removeSuffix(".py").toPath().joinToString(".").replace("/", File.separator)
     )
 }
\ No newline at end of file
diff --git a/utbot-python/src/main/kotlin/org/utbot/python/utils/TemporaryFileManager.kt b/utbot-python/src/main/kotlin/org/utbot/python/utils/TemporaryFileManager.kt
index b508f47137..2a60a9b803 100644
--- a/utbot-python/src/main/kotlin/org/utbot/python/utils/TemporaryFileManager.kt
+++ b/utbot-python/src/main/kotlin/org/utbot/python/utils/TemporaryFileManager.kt
@@ -15,7 +15,7 @@ object TemporaryFileManager {
     }
 
     fun assignTemporaryFile(fileName_: String? = null, tag: String? = null, addToCleaner: Boolean = true): File {
-        val fileName = fileName_ ?: ("${nextId++}_" + (tag ?: ""))
+        val fileName = fileName_ ?: ("tmp_${nextId++}_" + (tag ?: ""))
         val fullpath = Paths.get(tmpDirectory.toString(), fileName)
         val result = fullpath.toFile()
         if (addToCleaner)