diff --git a/test/SerialIOTest.cpp b/test/SerialIOTest.cpp
index 5e05cb2f78..f64e495bf9 100644
--- a/test/SerialIOTest.cpp
+++ b/test/SerialIOTest.cpp
@@ -3059,7 +3059,7 @@ TEST_CASE( "extend_dataset", "[serial]" )
 {
     extendDataset( "json" );
 #if openPMD_HAVE_ADIOS2
-    // extendDataset( "bp" );
+    extendDataset( "bp" );
 #endif
 #if openPMD_HAVE_HDF5
     // extendDataset( "h5" );