diff --git a/mo/src/mo.h b/mo/src/mo.h
index 3f44d2df7..f936b646d 100755
--- a/mo/src/mo.h
+++ b/mo/src/mo.h
@@ -184,6 +184,10 @@
 #include <problems/permutation/moTwoOptExNeighbor.h>
 #include <problems/permutation/moTwoOptExNeighborhood.h>
 
+#include <problems/partition/moBinaryPartition.h>
+#include <problems/partition/moBinaryPartitionSwapNeighbor.h>
+#include <problems/partition/moBinaryPartitionSwapNeighborhood.h>
+
 //#include <problems/eval/moMaxSATincrEval.h>
 //#include <problems/eval/moOneMaxIncrEval.h>
 //#include <problems/eval/moQAPIncrEval.h>
@@ -193,7 +197,6 @@
 //#include <problems/eval/moUBQPBitsIncrEval.h>
 //#include <problems/eval/moNKlandscapesIncrEval.h>
 
-
 #include <sampling/moAdaptiveWalkSampling.h>
 #include <sampling/moAutocorrelationSampling.h>
 #include <sampling/moDensityOfStatesSampling.h>
diff --git a/mo/src/problems/partition/moBinaryPartition.h b/mo/src/problems/partition/moBinaryPartition.h
index df5fed9fa..7feaef0b3 100644
--- a/mo/src/problems/partition/moBinaryPartition.h
+++ b/mo/src/problems/partition/moBinaryPartition.h
@@ -75,7 +75,11 @@ class moBinaryPartition : public EO<FitT>
          * @note In debug mode, double check that elements were actually moved.
          */
         void select(const size_t atom) {
-            assert(not selected.contains(atom));
+            #if __cplusplus >= 202002L
+                assert(not selected.contains(atom));
+            #else
+                assert(selected.count(atom) == 0);
+            #endif
 
             #ifndef NDEBUG
                 size_t has_erased =
@@ -98,7 +102,11 @@ class moBinaryPartition : public EO<FitT>
          * @note In debug mode, double check that elements were actually moved.
          */
         void reject(const size_t atom) {
-            assert(not rejected.contains(atom));
+            #if __cplusplus >= 202002L
+                assert(not rejected.contains(atom));
+            #else
+                assert(rejected.count(atom) == 0);
+            #endif
 
             #ifndef NDEBUG
                 size_t has_erased =
diff --git a/mo/src/problems/partition/moBinaryPartitionSwapNeighbor.h b/mo/src/problems/partition/moBinaryPartitionSwapNeighbor.h
index 915831122..8f6bc601c 100644
--- a/mo/src/problems/partition/moBinaryPartitionSwapNeighbor.h
+++ b/mo/src/problems/partition/moBinaryPartitionSwapNeighbor.h
@@ -3,7 +3,6 @@
 #include <utility>
 
 #include <mo>
-
 #include "moBinaryPartition.h"
 
 /** Stable neighbor for a binary partition.
diff --git a/mo/src/problems/partition/moBinaryPartitionSwapNeighborhood.h b/mo/src/problems/partition/moBinaryPartitionSwapNeighborhood.h
index f91b252da..d51325b26 100644
--- a/mo/src/problems/partition/moBinaryPartitionSwapNeighborhood.h
+++ b/mo/src/problems/partition/moBinaryPartitionSwapNeighborhood.h
@@ -87,8 +87,13 @@ class moBinaryPartitionSwapNeighborhood : public moNeighborhood<moBinaryPartitio
             //     << " from: " << from
             //     << std::endl;
 
-            assert( from.rejected.contains(selected(from,i_select)) );
-            assert( from.selected.contains(rejected(from,j_reject)) );
+            #if __cplusplus >= 202002L
+                assert( from.rejected.contains(selected(from,i_select)) );
+                assert( from.selected.contains(rejected(from,j_reject)) );
+            #else
+                assert( from.rejected.count(selected(from,i_select)) > 0 );
+                assert( from.selected.count(rejected(from,j_reject)) > 0 );
+            #endif
             assert( selected(from,i_select) != rejected(from,j_reject) );
 
             // Implant this move in the neighbor.
diff --git a/mo/test/CMakeLists.txt b/mo/test/CMakeLists.txt
index a27f97db9..184cdb651 100644
--- a/mo/test/CMakeLists.txt
+++ b/mo/test/CMakeLists.txt
@@ -96,6 +96,7 @@ set (TEST_LIST
 		t-moIndexedVectorTabuList
 #		t-moRndIndexedVectorTabuList
 		t-moDynSpanCoolingSchedule
+		t-moBinaryPartition
 		)
 
 ######################################################################################
diff --git a/mo/test/t-moBinaryPartition.cpp b/mo/test/t-moBinaryPartition.cpp
index 873d245bb..3300c83bf 100644
--- a/mo/test/t-moBinaryPartition.cpp
+++ b/mo/test/t-moBinaryPartition.cpp
@@ -1,7 +1,5 @@
 
-#include <frictionless/moBinaryPartition.h>
-#include <frictionless/moBinaryPartitionSwapNeighbor.h>
-#include <frictionless/moBinaryPartitionSwapNeighborhood.h>
+#include <mo>
 
 int main()
 {