The phrase "testing burden" refers to the responsibility or pressure of conducting tests or evaluations. It suggests the effort, difficulties, or workload associated with performing tests. Full definition
For certain we need to address the heavy test burden for students and teachers. (blog.k-12leadership.org)
(Admittedly, they may not know the difference, but all the available data shows that the overwhelming majority of what is sometimes an unreasonable testing burden is imposed by states and districts.) (educationnext.org)
President Obama has directed the Department of Education (the Department) to review its policies to address any places where the Administration may have contributed to the problem of overemphasis on testing burdening classroom time. (ed.gov)