diff --git a/tests/files/org/openml/test/tasks/1/task.xml b/tests/files/org/openml/test/tasks/1/task.xml
index c70baaff3..38325bc24 100644
--- a/tests/files/org/openml/test/tasks/1/task.xml
+++ b/tests/files/org/openml/test/tasks/1/task.xml
@@ -9,6 +9,7 @@
 </oml:data_set>  </oml:input>
 	      <oml:input name="estimation_procedure">
     <oml:estimation_procedure>
+        <oml:id>1</oml:id>
 <oml:type>crossvalidation</oml:type>
 <oml:data_splits_url>http://www.openml.org/api_splits/get/1/Task_1_splits.arff</oml:data_splits_url>
 <oml:parameter name="number_repeats">1</oml:parameter>
diff --git a/tests/files/org/openml/test/tasks/1882/task.xml b/tests/files/org/openml/test/tasks/1882/task.xml
index 4a744b397..07e63d969 100644
--- a/tests/files/org/openml/test/tasks/1882/task.xml
+++ b/tests/files/org/openml/test/tasks/1882/task.xml
@@ -9,6 +9,7 @@
 </oml:data_set>  </oml:input>
 	      <oml:input name="estimation_procedure">
     <oml:estimation_procedure>
+        <oml:id>3</oml:id>
 <oml:type>crossvalidation</oml:type>
 <oml:data_splits_url>http://capa.win.tue.nl/api_splits/get/1882/Task_1882_splits.arff</oml:data_splits_url>
 <oml:parameter name="number_repeats">10</oml:parameter>
diff --git a/tests/files/org/openml/test/tasks/3/task.xml b/tests/files/org/openml/test/tasks/3/task.xml
index ef538330d..e73bbc75a 100644
--- a/tests/files/org/openml/test/tasks/3/task.xml
+++ b/tests/files/org/openml/test/tasks/3/task.xml
@@ -9,6 +9,7 @@
 </oml:data_set>  </oml:input>
 	      <oml:input name="estimation_procedure">
     <oml:estimation_procedure>
+        <oml:id>1</oml:id>
 <oml:type>crossvalidation</oml:type>
 <oml:data_splits_url>http://www.openml.org/api_splits/get/3/Task_3_splits.arff</oml:data_splits_url>
 <oml:parameter name="number_repeats">1</oml:parameter>