diff --git a/tests/integration/ps.bats b/tests/integration/ps.bats
index 01fae7a2..75f955f9 100644
--- a/tests/integration/ps.bats
+++ b/tests/integration/ps.bats
@@ -11,7 +11,7 @@ function teardown() {
   teardown_busybox
 }
 
-@test "ps -eaf" {
+@test "ps" {
   # start busybox detached
   runc run -d --console /dev/pts/ptmx test_busybox
   [ "$status" -eq 0 ]
@@ -21,8 +21,39 @@ function teardown() {
 
   testcontainer test_busybox running
 
-  runc ps test_busybox -eaf
+  runc ps test_busybox
   [ "$status" -eq 0 ]
   [[ ${lines[0]} =~ UID\ +PID\ +PPID\ +C\ +STIME\ +TTY\ +TIME\ +CMD+ ]]
   [[ "${lines[1]}" == *"root"*[0-9]* ]]
 }
+
+@test "ps -f json" {
+  # start busybox detached
+  runc run -d --console /dev/pts/ptmx test_busybox
+  [ "$status" -eq 0 ]
+
+  # check state
+  wait_for_container 15 1 test_busybox
+
+  testcontainer test_busybox running
+
+  runc ps -f json test_busybox
+  [ "$status" -eq 0 ]
+  [[ ${lines[0]} =~ [0-9]+ ]]
+}
+
+@test "ps -e -x" {
+  # start busybox detached
+  runc run -d --console /dev/pts/ptmx test_busybox
+  [ "$status" -eq 0 ]
+
+  # check state
+  wait_for_container 15 1 test_busybox
+
+  testcontainer test_busybox running
+
+  runc ps test_busybox -e -x
+  [ "$status" -eq 0 ]
+  [[ ${lines[0]} =~ \ +PID\ +TTY\ +STAT\ +TIME\ +COMMAND+ ]]
+  [[ "${lines[1]}" =~ [0-9]+ ]]
+}