diff --git a/test/env.bats b/test/env.bats
index c28e2c6a..fe9cf439 100644
--- a/test/env.bats
+++ b/test/env.bats
@@ -20,7 +20,7 @@ test:
         url: $BUSYBOX_OCI
     run: |
         # make sure that /stacker is readonly
-        grep "/stacker" /proc/mounts | grep -P "\sro[\s,]"
+        grep "/stacker" /proc/mounts | grep "[[:space:]]ro[[:space:],]"
 
         # make sure stacker deleted the non-import
         [ ! -f /stacker/foo ]
diff --git a/test/overlay-dirs.bats b/test/overlay-dirs.bats
index e62e31fd..896a1837 100644
--- a/test/overlay-dirs.bats
+++ b/test/overlay-dirs.bats
@@ -184,8 +184,9 @@ first:
           dest: /usr/local
     run: |
         [ -f /usr/local/file ]
-        [ "\$(stat --format=%G /usr/local/file )" == "root" ]
-        [ "\$(stat --format=%U /usr/local/file )" == "root" ]
+        # -c == --format, but busybox does not support --format
+        [ "\$(stat -c%G /usr/local/file )" == "root" ]
+        [ "\$(stat -c%U /usr/local/file )" == "root" ]
 EOF
     stacker build
 
diff --git a/test/unprivileged.bats b/test/unprivileged.bats
index 6fa61ee2..1db0a475 100644
--- a/test/unprivileged.bats
+++ b/test/unprivileged.bats
@@ -154,6 +154,6 @@ EOF
 
     mkdir layer0
     mount -t squashfs oci/blobs/sha256/$layer0 layer0
-    echo "mount has uid $(stat --format "%u" layer0/usr/bin/mount)"
-    [ "$(stat --format "%u" layer0/usr/bin/mount)" = "0" ]
+    echo "mount has uid $(stat --format "%u" layer0/bin/mount)"
+    [ "$(stat --format "%u" layer0/bin/mount)" = "0" ]
 }