diff --git a/ci-scripts/oai-ci-vm-tool b/ci-scripts/oai-ci-vm-tool
index 9d6349077f..3fa91b862c 100755
--- a/ci-scripts/oai-ci-vm-tool
+++ b/ci-scripts/oai-ci-vm-tool
@@ -186,7 +186,7 @@ function variant__v3__phy_sim {
     BUILD_OPTIONS="--phy_simulators"
     VM_MEMORY=8192
     VM_DISK=20
-    RUN_OPTIONS="./run_exec_autotests.bash -g \"01510* 015111\" -q -np -b"
+    RUN_OPTIONS="./run_exec_autotests.bash -g \"01510* 015111 015112\" -q -np -b"
 }
 
 function variant__v4__cppcheck {
diff --git a/cmake_targets/autotests/README.txt b/cmake_targets/autotests/README.txt
index 10c14fd59a..19a333c626 100644
--- a/cmake_targets/autotests/README.txt
+++ b/cmake_targets/autotests/README.txt
@@ -142,10 +142,14 @@ Obj.#   Case#   Test#	Description
                         (Test 11: 10 MHz, R7.FDD (MCS 25), EVA5, 17.7dB (70%))
                         (TM2 Test 1 10 MHz, R.11 FDD (MCS 14), EVA5, 6.8 dB (70%)),
                         (TM2 Test 1b 20 MHz, R.11-2 FDD (MCS 13), EVA5, 5.9 dB (70%)),
-01      51      11      nr_ulsim Test cases. (Test1: MCS 9),
-                        (Test2: MCS 16),
-                        (Test3: MCS 28)
-
+01      51      11      nr_ulsim Test cases. (Test1: MCS 9 106 PRBs),
+                        (Test2: MCS 16 50 PRBs),
+                        (Test3: MCS 28 50 PRBs),
+                        (Test4: MCS 9 217 PRBs),
+                        (Test5: MCS 9 273 PRBs)
+01      51      12      nr_prachsim Test cases.(Test1: 106 PRBs),
+                        (Test2: 217 PRBs),
+                        (Test3: 273 PRBs)
 
 
 
diff --git a/cmake_targets/autotests/test_case_list.xml b/cmake_targets/autotests/test_case_list.xml
index b3954db1fd..5b8e5db1ab 100644
--- a/cmake_targets/autotests/test_case_list.xml
+++ b/cmake_targets/autotests/test_case_list.xml
@@ -1259,6 +1259,26 @@
       <nruns>3</nruns>
     </testCase>
 
+    <testCase id="015112">
+      <class>execution</class>
+      <desc>nr_prachsim Test cases. (Test1: 106 PRBs),
+                                    (Test2: 217 PRBs),
+                                    (Test3: 273 PRBs)</desc>
+      <pre_compile_prog></pre_compile_prog>
+      <compile_prog>$OPENAIR_DIR/cmake_targets/build_oai</compile_prog>
+      <compile_prog_args> --phy_simulators -c </compile_prog_args>
+      <pre_exec>$OPENAIR_DIR/cmake_targets/autotests/tools/free_mem.bash</pre_exec>
+      <pre_exec_args></pre_exec_args>
+      <main_exec> $OPENAIR_DIR/targets/bin/nr_prachsim.Rel15</main_exec>
+      <main_exec_args>-a -s -30 -n 100 -p 16 -R 106
+                      -a -s -30 -n 100 -p 16 -R 217
+                      -a -s -30 -n 100 -p 16 -R 273</main_exec_args>
+      <tags>nr_prachsim.test1 nr_prachsim.test2 nr_prachsim.test3</tags>
+      <search_expr_true>PRACH test OK</search_expr_true>
+      <search_expr_false>segmentation fault|assertion|exiting|fatal</search_expr_false>
+      <nruns>3</nruns>
+    </testCase>
+
   <testCase id="015500" >
     <class>lte-softmodem</class>
     <desc></desc>
diff --git a/openair1/SIMULATION/NR_PHY/prachsim.c b/openair1/SIMULATION/NR_PHY/prachsim.c
index 47f3dd70aa..aed7eb4505 100644
--- a/openair1/SIMULATION/NR_PHY/prachsim.c
+++ b/openair1/SIMULATION/NR_PHY/prachsim.c
@@ -617,7 +617,7 @@ int main(int argc, char **argv){
 
   rx_prach_start = subframe*frame_parms->get_samples_per_slot(subframe,frame_parms);
 
-  for (SNR=snr0; SNR<snr1; SNR+=.2) {
+  for (SNR=snr0; SNR<snr1; SNR+=.1) {
     for (ue_speed=ue_speed0; ue_speed<ue_speed1; ue_speed+=10) {
       delay_avg = 0.0;
       // max Doppler shift
@@ -684,10 +684,13 @@ int main(int argc, char **argv){
         }
       }
       printf("SNR %f dB, UE Speed %f km/h: errors %d/%d (delay %f)\n", SNR, ue_speed, prach_errors, n_frames, delay_avg/(double)(n_frames-prach_errors));
-      //printf("(%f,%f)\n",ue_speed,(double)prach_errors/(double)n_frames);
+      if (prach_errors)
+        break;
     } // UE Speed loop
-    //printf("SNR %f dB, UE Speed %f km/h: errors %d/%d (delay %f)\n",SNR,ue_speed,prach_errors,n_frames,delay_avg/(double)(n_frames-prach_errors));
-    //  printf("(%f,%f)\n",SNR,(double)prach_errors/(double)n_frames);
+    if (!prach_errors) {
+      printf("PRACH test OK\n");
+      break;
+    }
   } //SNR loop
 
   for (i=0; i<2; i++) {