DIN 53507
This standard specifies a method for determining the tear resistance of rubber and elastomers. The test is used to assess the resistance of rubber materials to tearing.
Rubber and Elastomers - Tear Resistance Test
2016-02 (February 2016)
As I couldn't find a publicly available PDF of the standard, I'll provide you with a summary of its content. If you'd like to access the full standard, I recommend purchasing it from the DIN (Deutsches Institut für Normung) website or a similar standards repository.