diff --git a/iris_grib/tests/results/integration/load_convert/sample_file_loads/lambert_grib1.cml b/iris_grib/tests/results/integration/load_convert/sample_file_loads/lambert_grib1.cml
index 025087b2..7c0b4d05 100644
--- a/iris_grib/tests/results/integration/load_convert/sample_file_loads/lambert_grib1.cml
+++ b/iris_grib/tests/results/integration/load_convert/sample_file_loads/lambert_grib1.cml
@@ -2,7 +2,7 @@
 <cubes xmlns="urn:x-iris:cubeml-0.2">
   <cube dtype="float64" standard_name="air_temperature" units="kelvin">
     <attributes>
-      <attribute name="GRIB_PARAM" value="GRIB1:d002c007n011"/>
+      <attribute name="GRIB_PARAM" value="GRIB1:t002c007n011"/>
     </attributes>
     <coords>
       <coord>
diff --git a/iris_grib/tests/results/integration/load_convert/sample_file_loads/polar_stereo_grib1.cml b/iris_grib/tests/results/integration/load_convert/sample_file_loads/polar_stereo_grib1.cml
index 1b6afa31..c1c845ae 100644
--- a/iris_grib/tests/results/integration/load_convert/sample_file_loads/polar_stereo_grib1.cml
+++ b/iris_grib/tests/results/integration/load_convert/sample_file_loads/polar_stereo_grib1.cml
@@ -2,7 +2,7 @@
 <cubes xmlns="urn:x-iris:cubeml-0.2">
   <cube dtype="float64" units="unknown">
     <attributes>
-      <attribute name="GRIB_PARAM" value="GRIB1:d002c007n061"/>
+      <attribute name="GRIB_PARAM" value="GRIB1:t002c007n061"/>
     </attributes>
     <coords>
       <coord>
diff --git a/iris_grib/tests/results/integration/load_convert/sample_file_loads/reduced_ll_grib1.cml b/iris_grib/tests/results/integration/load_convert/sample_file_loads/reduced_ll_grib1.cml
index 326a5266..65c5483f 100644
--- a/iris_grib/tests/results/integration/load_convert/sample_file_loads/reduced_ll_grib1.cml
+++ b/iris_grib/tests/results/integration/load_convert/sample_file_loads/reduced_ll_grib1.cml
@@ -2,7 +2,7 @@
 <cubes xmlns="urn:x-iris:cubeml-0.2">
   <cube dtype="float64" standard_name="air_temperature" units="kelvin">
     <attributes>
-      <attribute name="GRIB_PARAM" value="GRIB1:d002c074n011"/>
+      <attribute name="GRIB_PARAM" value="GRIB1:t002c074n011"/>
     </attributes>
     <coords>
       <coord>
diff --git a/iris_grib/tests/results/integration/load_convert/sample_file_loads/regular_gg_grib1.cml b/iris_grib/tests/results/integration/load_convert/sample_file_loads/regular_gg_grib1.cml
index ec4b03bd..0fab6aa5 100644
--- a/iris_grib/tests/results/integration/load_convert/sample_file_loads/regular_gg_grib1.cml
+++ b/iris_grib/tests/results/integration/load_convert/sample_file_loads/regular_gg_grib1.cml
@@ -2,7 +2,7 @@
 <cubes xmlns="urn:x-iris:cubeml-0.2">
   <cube dtype="float64" standard_name="x_wind" units="m s-1">
     <attributes>
-      <attribute name="GRIB_PARAM" value="GRIB1:d002c007n033"/>
+      <attribute name="GRIB_PARAM" value="GRIB1:t002c007n033"/>
     </attributes>
     <coords>
       <coord>
diff --git a/iris_grib/tests/results/integration/load_convert/sample_file_loads/time_bound_grib1.cml b/iris_grib/tests/results/integration/load_convert/sample_file_loads/time_bound_grib1.cml
index 30dd537c..977fe028 100644
--- a/iris_grib/tests/results/integration/load_convert/sample_file_loads/time_bound_grib1.cml
+++ b/iris_grib/tests/results/integration/load_convert/sample_file_loads/time_bound_grib1.cml
@@ -2,7 +2,7 @@
 <cubes xmlns="urn:x-iris:cubeml-0.2">
   <cube dtype="float64" long_name="UNKNOWN LOCAL PARAM 106.137" units="unknown">
     <attributes>
-      <attribute name="GRIB_PARAM" value="GRIB1:d137c074n106"/>
+      <attribute name="GRIB_PARAM" value="GRIB1:t137c074n106"/>
     </attributes>
     <coords>
       <coord>