diff --git a/jupyter/src/com/intellij/notebooks/jupyter/core/jupyter/preview/JupyterCefHttpHandlerBase.kt b/jupyter/src/com/intellij/notebooks/jupyter/core/jupyter/preview/JupyterCefHttpHandlerBase.kt
index 45f2ae2926b2..ca59ffafc614 100644
--- a/jupyter/src/com/intellij/notebooks/jupyter/core/jupyter/preview/JupyterCefHttpHandlerBase.kt
+++ b/jupyter/src/com/intellij/notebooks/jupyter/core/jupyter/preview/JupyterCefHttpHandlerBase.kt
@@ -22,7 +22,7 @@ abstract class JupyterCefHttpHandlerBase(private val absolutePathFiles: Set<Stri
   companion object {
     private val allowedTypes = setOf("css", "js", "html", "svg", "woff", "woff2", "ttf")
     private const val JUPYTER_HTTP_URI = "jupyter"
-    private const val PATH_PREFIX = "/${JUPYTER_HTTP_URI}"
+    const val PATH_PREFIX: String = "/${JUPYTER_HTTP_URI}"
 
     /**
      * Jupyter HTTP files can be accessed with this URL
@@ -117,4 +117,4 @@ abstract class JupyterCefHttpHandlerBase(private val absolutePathFiles: Set<Stri
     val resource = getResource(this::class.java, "${appName}/${file}")
     return resource.readBytes()
   }
-}
+}
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