diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 032250f5..fb6f053a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -33,7 +33,7 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         python-version: ["3.10"]
-        hdf5-branch: ["hdf5_1_14", "develop"]  
+        hdf5-branch: ["hdf5_1_14"]  
 
     runs-on: ${{matrix.os}}
     steps:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index edaca480..a31fd37e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -311,7 +311,6 @@ macro (INSTALL_TARGET_PDB libtarget targetdestination targetcomponent)
   endif ()
 endmacro ()
 
-
 #-----------------------------------------------------------------------------
 # Setup output Directories
 #-----------------------------------------------------------------------------
@@ -582,7 +581,6 @@ if (BUILD_STATIC_LIBS)
     ${HDF5_C_HL_LIBRARIES})
 endif()
 
-
 #-----------------------------------------------------------------------------
 # Build the REST VOL
 #-----------------------------------------------------------------------------
diff --git a/configure.ac b/configure.ac
index 4fd4f614..c6adb59d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1161,6 +1161,9 @@ else
   enable_static=no
 fi
 
+# Autotools build isn't supported by HDF5 >= 2.0.0, so assume HDF5 version is < 2.0.0
+AC_DEFINE([HDF5_2], [0], [Whether HDF5 version is at least 2.0.0])
+
 ## Expose things for *.in markup
 AC_SUBST([STATIC_SHARED])
 AC_SUBST([enable_shared])
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index cea92b9d..88df5f75 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -43,6 +43,7 @@ MACRO (ADD_HDF5_VOL_REST_EXE file)
     target_link_libraries (${file} PUBLIC ${HDF5_VOL_REST_LIB_TARGET})
     set_target_properties (${file} PROPERTIES FOLDER test)
     add_dependencies(${file} ${HDF5_VOL_REST_LIB_TARGET})
+    target_compile_definitions(${file} PRIVATE HDF5_2=$<IF:$<VERSION_GREATER_EQUAL:${HDF5_VERSION},2.0.0>,1,0>)
   endif ()
   if (BUILD_SHARED_LIBS)
     add_executable (${file}-shared ${HDF5_VOL_REST_TEST_SOURCE_DIR}/${file}.c)
@@ -50,6 +51,7 @@ MACRO (ADD_HDF5_VOL_REST_EXE file)
     target_link_libraries (${file}-shared PUBLIC ${HDF5_VOL_REST_LIBSH_TARGET})
     set_target_properties (${file}-shared PROPERTIES FOLDER test)
     add_dependencies(${file}-shared ${HDF5_VOL_REST_LIBSH_TARGET})
+    target_compile_definitions(${file}-shared PRIVATE HDF5_2=$<IF:$<VERSION_GREATER_EQUAL:${HDF5_VERSION},2.0.0>,1,0>)
   endif (BUILD_SHARED_LIBS)
 ENDMACRO (ADD_HDF5_VOL_REST_EXE file)
 
diff --git a/test/test_rest_vol.c b/test/test_rest_vol.c
index 44825a2d..d7c98933 100644
--- a/test/test_rest_vol.c
+++ b/test/test_rest_vol.c
@@ -18281,6 +18281,10 @@ generate_random_datatype(H5T_class_t parent_class)
                 goto case_vlen;
             case H5T_ARRAY:
                 goto case_array;
+#if HDF5_2
+            case H5T_COMPLEX:
+                goto case_complex;
+#endif
             default:
                 H5_FAILED();
                 printf("    invalid value for goto\n");
@@ -18365,6 +18369,10 @@ generate_random_datatype(H5T_class_t parent_class)
                 goto case_vlen;
             case H5T_ARRAY:
                 goto case_array;
+#if HDF5_2
+            case H5T_COMPLEX:
+                goto case_complex;
+#endif
             default:
                 H5_FAILED();
                 printf("    invalid value for goto\n");
@@ -18400,6 +18408,10 @@ generate_random_datatype(H5T_class_t parent_class)
                 goto case_vlen;
             case H5T_ARRAY:
                 goto case_array;
+#if HDF5_2
+            case H5T_COMPLEX:
+                goto case_complex;
+#endif
             default:
                 H5_FAILED();
                 printf("    invalid value for goto\n");
@@ -18443,6 +18455,10 @@ generate_random_datatype(H5T_class_t parent_class)
                     goto case_vlen;
                 case H5T_ARRAY:
                     goto case_array;
+#if HDF5_2
+                case H5T_COMPLEX:
+                    goto case_complex;
+#endif
                 default:
                     H5_FAILED();
                     printf("    invalid value for goto\n");
@@ -18527,6 +18543,10 @@ generate_random_datatype(H5T_class_t parent_class)
                     goto case_vlen;
                 case H5T_ARRAY:
                     goto case_array;
+#if HDF5_2
+                case H5T_COMPLEX:
+                    goto case_complex;
+#endif
                 default:
                     H5_FAILED();
                     printf("    invalid value for goto\n");
@@ -18566,6 +18586,10 @@ generate_random_datatype(H5T_class_t parent_class)
                     goto case_vlen;
                 case H5T_ARRAY:
                     goto case_array;
+#if HDF5_2
+                case H5T_COMPLEX:
+                    goto case_complex;
+#endif
                 default:
                     H5_FAILED();
                     printf("    invalid value for goto\n");
@@ -18614,6 +18638,10 @@ generate_random_datatype(H5T_class_t parent_class)
                     goto case_vlen;
                 case H5T_ARRAY:
                     goto case_array;
+#if HDF5_2
+                case H5T_COMPLEX:
+                    goto case_complex;
+#endif
                 default:
                     H5_FAILED();
                     printf("    invalid value for goto\n");
@@ -18669,6 +18697,10 @@ generate_random_datatype(H5T_class_t parent_class)
                 goto case_vlen;
             case H5T_ARRAY:
                 goto case_array;
+#if HDF5_2
+            case H5T_COMPLEX:
+                goto case_complex;
+#endif
             default:
                 H5_FAILED();
                 printf("    invalid value for goto\n");
@@ -18710,6 +18742,10 @@ generate_random_datatype(H5T_class_t parent_class)
                     goto case_vlen;
                 case H5T_ARRAY:
                     goto case_array;
+#if HDF5_2
+                case H5T_COMPLEX:
+                    goto case_complex;
+#endif
                 default:
                     H5_FAILED();
                     printf("    invalid value for goto\n");
@@ -18739,6 +18775,44 @@ generate_random_datatype(H5T_class_t parent_class)
 
         break;
     }
+#if HDF5_2
+case_complex:
+    case H5T_COMPLEX: {
+        /* Complex datatypes are unsupported, try again */
+        switch (rand() % H5T_NCLASSES) {
+            case H5T_INTEGER:
+                goto case_integer;
+            case H5T_FLOAT:
+                goto case_float;
+            case H5T_TIME:
+                goto case_time;
+            case H5T_STRING:
+                goto case_string;
+            case H5T_BITFIELD:
+                goto case_bitfield;
+            case H5T_OPAQUE:
+                goto case_opaque;
+            case H5T_COMPOUND:
+                goto case_compound;
+            case H5T_REFERENCE:
+                goto case_reference;
+            case H5T_ENUM:
+                goto case_enum;
+            case H5T_VLEN:
+                goto case_vlen;
+            case H5T_ARRAY:
+                goto case_array;
+            case H5T_COMPLEX:
+                goto case_complex;
+            default:
+                H5_FAILED();
+                printf("    invalid value for goto\n");
+                break;
+        }
+
+        break;
+    }
+#endif
 
     default:
         H5_FAILED();