diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e7f5fca10..04c4ea154 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -80,7 +80,9 @@ jobs:
 
     - name: Test
       working-directory: ${{github.workspace}}/build
-      run: ctest -j2 --output-on-failure -C $BUILD_TYPE
+      run: |
+        ctest -j2 --output-on-failure -C $BUILD_TYPE
+        ! ctest --verbose -C $BUILD_TYPE | grep HDF5-DIAG
 
 
   # Job testing several versions of hdf5
@@ -118,7 +120,9 @@ jobs:
 
     - name: Test
       working-directory: ${{github.workspace}}/build
-      run: ctest -j2 --output-on-failure -C $BUILD_TYPE
+      run: |
+        ctest -j2 --output-on-failure -C $BUILD_TYPE
+        ! ctest --verbose -C $BUILD_TYPE | grep HDF5-DIAG
 
 
     - name: Examples
@@ -156,7 +160,9 @@ jobs:
 
     - name: Test
       working-directory: ${{github.workspace}}/build
-      run: ctest -j2 --output-on-failure -C $BUILD_TYPE
+      run: |
+        ctest -j2 --output-on-failure -C $BUILD_TYPE
+        ! ctest --verbose -C $BUILD_TYPE | grep HDF5-DIAG
 
     - name: Examples
       working-directory: ${{github.workspace}}/build/src/examples
@@ -199,7 +205,9 @@ jobs:
 
     - name: Test
       working-directory: ${{github.workspace}}/build
-      run: ctest -j2 --output-on-failure -C $BUILD_TYPE
+      run: |
+        ctest -j2 --output-on-failure -C $BUILD_TYPE
+        ! ctest --verbose -C $BUILD_TYPE | grep HDF5-DIAG
 
     - name: Examples
       working-directory: ${{github.workspace}}/build/src/examples
@@ -295,7 +303,9 @@ jobs:
 
     - name: Test
       working-directory: ${{github.workspace}}/build
-      run: ctest -j2 --output-on-failure -C $BUILD_TYPE
+      run: |
+        ctest -j2 --output-on-failure -C $BUILD_TYPE
+        ! ctest --verbose -C $BUILD_TYPE | grep HDF5-DIAG
 
     - name: Examples
       working-directory: ${{github.workspace}}/build/src/examples
@@ -348,4 +358,6 @@ jobs:
     - name: Test
       working-directory: ${{github.workspace}}/build
       shell: bash -l {0}
-      run: ctest -j2 --output-on-failure -C $BUILD_TYPE
+      run: |
+        ctest -j2 --output-on-failure -C $BUILD_TYPE
+        ! ctest --verbose -C $BUILD_TYPE | grep HDF5-DIAG
diff --git a/include/highfive/H5DataType.hpp b/include/highfive/H5DataType.hpp
index 886107961..b2b1881f3 100644
--- a/include/highfive/H5DataType.hpp
+++ b/include/highfive/H5DataType.hpp
@@ -70,7 +70,7 @@ class DataType: public Object {
     /// \brief Returns the length (in bytes) of this type elements
     ///
     /// Notice that the size of variable length sequences may have limited applicability
-    ///   given that it refers to the size of the control structure. For info see
+    /// given that it refers to the size of the control structure. For info see
     ///   https://support.hdfgroup.org/HDF5/doc/RM/RM_H5T.html#Datatype-GetSize
     size_t getSize() const;