Unify G=1 and G=-1 test cases

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/suites/test_suite_dhm.data b/tests/suites/test_suite_dhm.data
index 863e25c..f18db2e 100644
--- a/tests/suites/test_suite_dhm.data
+++ b/tests/suites/test_suite_dhm.data
@@ -70,12 +70,6 @@
 Diffie-Hellman full exchange: 286-bit
 dhm_do_dhm:10:"93450983094850938450983409623982317398171298719873918739182739712938719287391879381271":36:10:"9345098309485093845098340962223981329819812792137312973297123912791271":0
 
-Diffie-Hellman trivial subgroup #1
-dhm_do_dhm:10:"23":1:10:"1":MBEDTLS_ERR_DHM_BAD_INPUT_DATA
-
-Diffie-Hellman trivial subgroup #2
-dhm_do_dhm:10:"23":1:10:"-1":MBEDTLS_ERR_DHM_BAD_INPUT_DATA
-
 Diffie-Hellman small modulus
 dhm_do_dhm:10:"3":1:10:"5":MBEDTLS_ERR_DHM_MAKE_PARAMS_FAILED+MBEDTLS_ERR_MPI_BAD_INPUT_DATA
 
@@ -88,6 +82,9 @@
 Diffie-Hellman with G=1
 dhm_do_dhm:10:"93450983094850938450983409623":13:10:"1":MBEDTLS_ERR_DHM_BAD_INPUT_DATA
 
+Diffie-Hellman with G=-1
+dhm_do_dhm:10:"93450983094850938450983409623":13:10:"-1":MBEDTLS_ERR_DHM_BAD_INPUT_DATA
+
 Diffie-Hellman with G=P-1
 dhm_do_dhm:10:"93450983094850938450983409623":13:10:"93450983094850938450983409622":MBEDTLS_ERR_DHM_BAD_INPUT_DATA