diff --git a/Jenkinsfile b/Jenkinsfile
index d5894e8bbd..124bae502d 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -389,7 +389,7 @@ node {
 
   builders['macOS-release'] = get_macos_pipeline('Release')
   builders['macOS-debug'] = get_macos_pipeline('Debug')
-  builders['Windows10'] = get_win10_pipeline()
+  // builders['Windows10'] = get_win10_pipeline()
   //builders['Debian10/Meson'] = get_meson_debian_pipeline()
 
 
diff --git a/conanfile_macos.txt b/conanfile_macos.txt
index 8aeca387ac..2b2b4442df 100644
--- a/conanfile_macos.txt
+++ b/conanfile_macos.txt
@@ -1,7 +1,7 @@
 [requires]
 boost/1.69.0
 hdf5/1.10.6
-zlib/1.2.8
+zlib/1.2.11
 bzip2/1.0.8
 
 [generators]
diff --git a/src/h5cpp/node/dataset.cpp b/src/h5cpp/node/dataset.cpp
index 568bdc4f57..23c730ca91 100644
--- a/src/h5cpp/node/dataset.cpp
+++ b/src/h5cpp/node/dataset.cpp
@@ -76,7 +76,7 @@ Node Dataset::create_dataset(const Group &base,
 // implementation of public member functions
 //=============================================================================
 Dataset::Dataset(const Node &node):
-  Node(node) 
+    Node(node)
 {
   if(node.type()!=Type::Dataset)
   {
@@ -242,10 +242,6 @@ void resize_by(const Dataset &dataset,size_t dimension_index,ssize_t delta)
     throw std::runtime_error(ss.str());
   }
 
-#ifdef __GNUC__
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wsign-compare"
-#endif
   if((delta<0) && (current_dims[dimension_index] < static_cast<hsize_t>(std::abs(delta))))
   {
     std::stringstream ss;
@@ -255,11 +251,10 @@ void resize_by(const Dataset &dataset,size_t dimension_index,ssize_t delta)
       <<" would be negative";
     throw std::runtime_error(ss.str());
   }
-#ifdef __GNUC__
-#pragma GCC diagnostic pop
-#endif
-
-  current_dims[dimension_index] += signed2unsigned<unsigned long long>(delta);
+  if (delta < 0)
+    current_dims[dimension_index] -= signed2unsigned<unsigned long long>(-delta);
+  else
+    current_dims[dimension_index] += signed2unsigned<unsigned long long>(delta);
   dataset.resize(current_dims);
 }
 
diff --git a/src/h5cpp/property/dataset_transfer.cpp b/src/h5cpp/property/dataset_transfer.cpp
index 2cafec873d..3858726898 100644
--- a/src/h5cpp/property/dataset_transfer.cpp
+++ b/src/h5cpp/property/dataset_transfer.cpp
@@ -50,10 +50,6 @@ DatasetTransferList::DatasetTransferList(ObjectHandle &&handle, bool do_check):
 
 #ifdef WITH_MPI
 
-#ifdef __GNUC__
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wreturn-type"
-#endif
 std::ostream &operator<<(std::ostream &stream,const MPITransferMode &mode)
 {
   switch(mode)
@@ -63,16 +59,10 @@ std::ostream &operator<<(std::ostream &stream,const MPITransferMode &mode)
     case MPITransferMode::Collective:
       return stream<<"COLLECTIVE";
   }
+  return stream;
 }
-#ifdef __GNUC__
-#pragma GCC diagnostic pop
-#endif
 
 
-#ifdef __GNUC__
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wreturn-type"
-#endif
 std::ostream &operator<<(std::ostream &stream,const MPIChunkOption &option)
 {
   switch(option)
@@ -82,11 +72,8 @@ std::ostream &operator<<(std::ostream &stream,const MPIChunkOption &option)
     case MPIChunkOption::MultiChunk:
       return stream<<"MULTI_CHUNK";
   }
+  return stream;
 }
-#ifdef __GNUC__
-#pragma GCC diagnostic pop
-#endif
-
 
 void DatasetTransferList::mpi_transfer_mode(MPITransferMode mode) const
 {
diff --git a/test/node/dataset_extent_test.cpp b/test/node/dataset_extent_test.cpp
index 54630b0b4b..a29851adc1 100644
--- a/test/node/dataset_extent_test.cpp
+++ b/test/node/dataset_extent_test.cpp
@@ -77,6 +77,12 @@ SCENARIO("testing the extent of a dataset") {
         REQUIRE_NOTHROW(dataset.extent(0, 123));
         THEN("the actual dimensions reads 123") {
           REQUIRE(current_dimension(dataset) == 123ul);
+          AND_WHEN("shrinking the elements for a single dimension using extent()") {
+            REQUIRE_NOTHROW(dataset.extent(0, -3));
+            THEN("the actual dimensions reads 120") {
+              REQUIRE(current_dimension(dataset) == 120ul);
+            }
+          }
         }
       }