diff --git a/lib/formatter.ex b/lib/formatter.ex
index 7483d8d..c18e599 100644
--- a/lib/formatter.ex
+++ b/lib/formatter.ex
@@ -116,7 +116,7 @@ defmodule JUnitFormatter do
 
   @doc "Formats time from nanos to seconds"
   @spec format_time(integer) :: binary
-  def format_time(time), do: ~c"~.4f" |> :io_lib.format([time / 1_000_000]) |> List.to_string()
+  def format_time(time), do: ~c"~.3f" |> :io_lib.format([time / 1_000_000]) |> List.to_string()
 
   @doc """
   Helper function to get the full path of the generated report file.