diff --git a/tests/QS/regtest-almo-2/TEST_FILES b/tests/QS/regtest-almo-2/TEST_FILES
index cf467da154..7f50e35554 100644
--- a/tests/QS/regtest-almo-2/TEST_FILES
+++ b/tests/QS/regtest-almo-2/TEST_FILES
@@ -3,7 +3,7 @@ almo-no-deloc.inp                                     11      9e-12           -1
 s-almo-no-deloc.inp                                   11       2e-5           -376.101195076451177
 s-almo-no-deloc-odd-ne.inp                            11       2e-5           -115.255611348790495
 FH-chain.inp                                          11      3e-10            -98.108319997143496
-ion-pair.inp                                          11      5e-08           -115.006279639496825
+ion-pair.inp                                          11      2e-13           -115.006279639496825
 LiF.inp                                               11      4e-12           -127.539319485641016
 zero-electron-frag.inp                                11      1e-08            -98.728605260047331
 matrix-iterate.inp                                    11      1e-09           -127.379124535900814
diff --git a/tests/QS/regtest-almo-2/ion-pair.inp b/tests/QS/regtest-almo-2/ion-pair.inp
index 1e5aca5676..6f511671b0 100644
--- a/tests/QS/regtest-almo-2/ion-pair.inp
+++ b/tests/QS/regtest-almo-2/ion-pair.inp
@@ -1,4 +1,5 @@
 &GLOBAL
+  PREFERRED_DIAG_LIBRARY SCALAPACK
   PRINT_LEVEL LOW
   PROJECT ion-pair
   RUN_TYPE ENERGY
@@ -48,7 +49,6 @@
     &END QS
     &SCF
       EPS_SCF 5.0E-3
-      IGNORE_CONVERGENCE_FAILURE
       MAX_SCF 20
       SCF_GUESS ATOMIC
       &OT