diff --git a/scalafix-tests/unit/src/test/scala/scalafix/tests/reflect/ToolClasspathTests.scala b/scalafix-tests/unit/src/test/scala/scalafix/tests/reflect/ToolClasspathTests.scala
index 04efc3c0a..55cd4ad57 100644
--- a/scalafix-tests/unit/src/test/scala/scalafix/tests/reflect/ToolClasspathTests.scala
+++ b/scalafix-tests/unit/src/test/scala/scalafix/tests/reflect/ToolClasspathTests.scala
@@ -49,7 +49,7 @@ class ToolClasspathTests extends FunSuite with BeforeAndAfterAll {
     val index =
       new LazySemanticdbIndex(toolClasspath = scalafmtClasspath)
     val decoder = ScalafixCompilerDecoder.baseCompilerDecoder(index)
-    val obtained = decoder.read(Conf.Str(tmp.toUri)).get
+    val obtained = decoder.read(Conf.Str(tmp.toUri.toString)).get
     val expectedName = "FormatRule"
     assert(obtained.name.value == expectedName)
   }