upstream issue - https://github.com/igraph/igraph/issues/1694

--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -678,10 +678,8 @@ add_examples(
   FOLDER examples/simple NAMES
   igraph_scg_grouping
   igraph_scg_grouping2
-  igraph_scg_grouping3
   igraph_scg_grouping4
   igraph_scg_semiprojectors
-  igraph_scg_semiprojectors2
   igraph_scg_semiprojectors3
   scg
 )