diff --git a/C/H5T/CMakeLists.txt b/C/H5T/CMakeLists.txt
index 2932e2a..b6c22d3 100644
--- a/C/H5T/CMakeLists.txt
+++ b/C/H5T/CMakeLists.txt
@@ -95,7 +95,7 @@ if (BUILD_TESTING)
           COMMAND    ${CMAKE_COMMAND}
           ARGS       -E copy_if_different ${PROJECT_SOURCE_DIR}/testfiles/${H5_LIBVER_DIR}/${example_name}.tst ${testdest}.tst
       )
-      if (HDF5_BUILD_TOOLS AND NOT ${example_name} STREQUAL "h5ex_t_convert")
+      if (HDF5_BUILD_TOOLS)
         add_custom_command (
             TARGET     ${EXAMPLE_VARNAME}_${example_name}
             POST_BUILD
@@ -112,6 +112,42 @@ if (BUILD_TESTING)
           ARGS       -E copy_if_different ${PROJECT_SOURCE_DIR}/testfiles/${H5_LIBVER_DIR}/${example_name}.tst ${PROJECT_BINARY_DIR}/${example_name}.tst
       )
       ADD_H5_CMP_TEST (${example_name})
+    elseif (${example_name} STREQUAL "h5ex_t_vlen" OR ${example_name} STREQUAL "h5ex_t_vlenatt")
+      set (testdest "${PROJECT_BINARY_DIR}/${example_name}")
+      #message (STATUS " Copying ${example_name}.test")
+      add_custom_command (
+          TARGET     ${EXAMPLE_VARNAME}_${example_name}
+          POST_BUILD
+          COMMAND    ${CMAKE_COMMAND}
+          ARGS       -E copy_if_different ${PROJECT_SOURCE_DIR}/testfiles/${H5_LIBVER_DIR}/${example_name}.tst ${testdest}.tst
+      )
+      if (HDF5_BUILD_TOOLS)
+        if (${${EXAMPLE_VARNAME}_USE_16_API} OR ${${EXAMPLE_VARNAME}_USE_18_API} OR ${${EXAMPLE_VARNAME}_USE_110_API} OR ${${EXAMPLE_VARNAME}_USE_112_API})
+          if (HDF5_VERSION_MAJOR VERSION_GREATER_EQUAL "1.14")
+            add_custom_command (
+                TARGET     ${EXAMPLE_VARNAME}_${example_name}
+                POST_BUILD
+                COMMAND    ${CMAKE_COMMAND}
+                ARGS       -E copy_if_different ${PROJECT_SOURCE_DIR}/testfiles/${H5_LIBVER_DIR}/114/${example_name}.ddl ${testdest}.ddl
+            )
+          else ()
+            add_custom_command (
+                TARGET     ${EXAMPLE_VARNAME}_${example_name}
+                POST_BUILD
+                COMMAND    ${CMAKE_COMMAND}
+                ARGS       -E copy_if_different ${PROJECT_SOURCE_DIR}/testfiles/${H5_LIBVER_DIR}/${example_name}.ddl ${testdest}.ddl
+            )
+          endif ()
+        else ()
+          add_custom_command (
+              TARGET     ${EXAMPLE_VARNAME}_${example_name}
+              POST_BUILD
+              COMMAND    ${CMAKE_COMMAND}
+              ARGS       -E copy_if_different ${PROJECT_SOURCE_DIR}/testfiles/${H5_LIBVER_DIR}/${example_name}.ddl ${testdest}.ddl
+          )
+        endif ()
+      endif ()
+      ADD_H5_TEST (${example_name})
     else ()
       set (testdest "${PROJECT_BINARY_DIR}/${example_name}")
       #message (STATUS " Copying ${example_name}.test")
@@ -121,7 +157,7 @@ if (BUILD_TESTING)
           COMMAND    ${CMAKE_COMMAND}
           ARGS       -E copy_if_different ${PROJECT_SOURCE_DIR}/testfiles/${H5_LIBVER_DIR}/${example_name}.tst ${testdest}.tst
       )
-      if (HDF5_BUILD_TOOLS AND NOT ${example_name} STREQUAL "h5ex_t_convert")
+      if (HDF5_BUILD_TOOLS)
         if (${${EXAMPLE_VARNAME}_USE_16_API} OR ${${EXAMPLE_VARNAME}_USE_18_API} OR ${${EXAMPLE_VARNAME}_USE_110_API})
           if ((HDF5_VERSION_MAJOR VERSION_GREATER_EQUAL "1.12") AND ((${example_name} STREQUAL "h5ex_t_objref" OR ${example_name} STREQUAL "h5ex_t_objrefatt") OR (${example_name} STREQUAL "h5ex_t_regref" OR ${example_name} STREQUAL "h5ex_t_regrefatt")))
             add_custom_command (
diff --git a/C/H5T/testfiles/110/114/h5ex_t_vlen.ddl b/C/H5T/testfiles/110/114/h5ex_t_vlen.ddl
new file mode 100644
index 0000000..95b9c5a
--- /dev/null
+++ b/C/H5T/testfiles/110/114/h5ex_t_vlen.ddl
@@ -0,0 +1,11 @@
+HDF5 "h5ex_t_vlen.h5" {
+GROUP "/" {
+   DATASET "DS1" {
+      DATATYPE  H5T_VLEN { H5T_STD_I32LE }
+      DATASPACE  SIMPLE { ( 2 ) / ( 2 ) }
+      DATA {
+      (0): (3, 2, 1), (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144)
+      }
+   }
+}
+}
diff --git a/C/H5T/testfiles/110/114/h5ex_t_vlenatt.ddl b/C/H5T/testfiles/110/114/h5ex_t_vlenatt.ddl
new file mode 100644
index 0000000..80005df
--- /dev/null
+++ b/C/H5T/testfiles/110/114/h5ex_t_vlenatt.ddl
@@ -0,0 +1,17 @@
+HDF5 "h5ex_t_vlenatt.h5" {
+GROUP "/" {
+   DATASET "DS1" {
+      DATATYPE  H5T_STD_I32LE
+      DATASPACE  NULL
+      DATA {
+      }
+      ATTRIBUTE "A1" {
+         DATATYPE  H5T_VLEN { H5T_STD_I32LE }
+         DATASPACE  SIMPLE { ( 2 ) / ( 2 ) }
+         DATA {
+         (0): (3, 2, 1), (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144)
+         }
+      }
+   }
+}
+}
diff --git a/C/H5T/testfiles/112/114/h5ex_t_vlen.ddl b/C/H5T/testfiles/112/114/h5ex_t_vlen.ddl
new file mode 100644
index 0000000..95b9c5a
--- /dev/null
+++ b/C/H5T/testfiles/112/114/h5ex_t_vlen.ddl
@@ -0,0 +1,11 @@
+HDF5 "h5ex_t_vlen.h5" {
+GROUP "/" {
+   DATASET "DS1" {
+      DATATYPE  H5T_VLEN { H5T_STD_I32LE }
+      DATASPACE  SIMPLE { ( 2 ) / ( 2 ) }
+      DATA {
+      (0): (3, 2, 1), (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144)
+      }
+   }
+}
+}
diff --git a/C/H5T/testfiles/112/114/h5ex_t_vlenatt.ddl b/C/H5T/testfiles/112/114/h5ex_t_vlenatt.ddl
new file mode 100644
index 0000000..80005df
--- /dev/null
+++ b/C/H5T/testfiles/112/114/h5ex_t_vlenatt.ddl
@@ -0,0 +1,17 @@
+HDF5 "h5ex_t_vlenatt.h5" {
+GROUP "/" {
+   DATASET "DS1" {
+      DATATYPE  H5T_STD_I32LE
+      DATASPACE  NULL
+      DATA {
+      }
+      ATTRIBUTE "A1" {
+         DATATYPE  H5T_VLEN { H5T_STD_I32LE }
+         DATASPACE  SIMPLE { ( 2 ) / ( 2 ) }
+         DATA {
+         (0): (3, 2, 1), (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144)
+         }
+      }
+   }
+}
+}
diff --git a/C/H5T/testfiles/112/h5ex_t_vlen.ddl b/C/H5T/testfiles/112/h5ex_t_vlen.ddl
index 95b9c5a..53f4863 100644
--- a/C/H5T/testfiles/112/h5ex_t_vlen.ddl
+++ b/C/H5T/testfiles/112/h5ex_t_vlen.ddl
@@ -1,7 +1,7 @@
 HDF5 "h5ex_t_vlen.h5" {
 GROUP "/" {
    DATASET "DS1" {
-      DATATYPE  H5T_VLEN { H5T_STD_I32LE }
+      DATATYPE  H5T_VLEN { H5T_STD_I32LE}
       DATASPACE  SIMPLE { ( 2 ) / ( 2 ) }
       DATA {
       (0): (3, 2, 1), (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144)
diff --git a/C/H5T/testfiles/112/h5ex_t_vlenatt.ddl b/C/H5T/testfiles/112/h5ex_t_vlenatt.ddl
index 80005df..a2b32e8 100644
--- a/C/H5T/testfiles/112/h5ex_t_vlenatt.ddl
+++ b/C/H5T/testfiles/112/h5ex_t_vlenatt.ddl
@@ -6,7 +6,7 @@ GROUP "/" {
       DATA {
       }
       ATTRIBUTE "A1" {
-         DATATYPE  H5T_VLEN { H5T_STD_I32LE }
+         DATATYPE  H5T_VLEN { H5T_STD_I32LE}
          DATASPACE  SIMPLE { ( 2 ) / ( 2 ) }
          DATA {
          (0): (3, 2, 1), (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144)
diff --git a/C/H5T/testfiles/18/114/h5ex_t_vlen.ddl b/C/H5T/testfiles/18/114/h5ex_t_vlen.ddl
new file mode 100644
index 0000000..95b9c5a
--- /dev/null
+++ b/C/H5T/testfiles/18/114/h5ex_t_vlen.ddl
@@ -0,0 +1,11 @@
+HDF5 "h5ex_t_vlen.h5" {
+GROUP "/" {
+   DATASET "DS1" {
+      DATATYPE  H5T_VLEN { H5T_STD_I32LE }
+      DATASPACE  SIMPLE { ( 2 ) / ( 2 ) }
+      DATA {
+      (0): (3, 2, 1), (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144)
+      }
+   }
+}
+}
diff --git a/C/H5T/testfiles/18/114/h5ex_t_vlenatt.ddl b/C/H5T/testfiles/18/114/h5ex_t_vlenatt.ddl
new file mode 100644
index 0000000..80005df
--- /dev/null
+++ b/C/H5T/testfiles/18/114/h5ex_t_vlenatt.ddl
@@ -0,0 +1,17 @@
+HDF5 "h5ex_t_vlenatt.h5" {
+GROUP "/" {
+   DATASET "DS1" {
+      DATATYPE  H5T_STD_I32LE
+      DATASPACE  NULL
+      DATA {
+      }
+      ATTRIBUTE "A1" {
+         DATATYPE  H5T_VLEN { H5T_STD_I32LE }
+         DATASPACE  SIMPLE { ( 2 ) / ( 2 ) }
+         DATA {
+         (0): (3, 2, 1), (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144)
+         }
+      }
+   }
+}
+}