diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7adfba9..6969ac0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Build the Docker image
         run: |
           cp -v extras/test/Dockerfile .
@@ -18,4 +18,4 @@ jobs:
       - name: Run main test suite
         run: docker run -t --privileged dyne/tomb /bin/bash -c "make test"
       - name: Run Tomb-kdb tests
-        run: docker run -t --privileged dyne/tomb /bin/bash -c "make -C extras/kdf-keys test"
\ No newline at end of file
+        run: docker run -t --privileged dyne/tomb /bin/bash -c "make -C extras/kdf-keys test"
diff --git a/extras/docker/Dockerfile b/extras/docker/Dockerfile
index 64feab9..805feee 100644
--- a/extras/docker/Dockerfile
+++ b/extras/docker/Dockerfile
@@ -4,7 +4,7 @@
 # This creates an Ubuntu derived base image and installs the tomb libarary
 # along with it's dependencies.
 
-FROM dyne/devuan:beowulf
+FROM dyne/devuan:chimaera
 
 ARG DEBIAN_FRONTEND=noninteractive
 ARG TOMB_VERSION=2.9
@@ -19,7 +19,8 @@ RUN apt-get update -y && \
 	zsh \
 	gnupg \
 	cryptsetup \
-	pinentry-curses \
+	pinentry pinentry-curses \
+	file xxd \
 	steghide \
 	mlocate \
 	swish-e
diff --git a/extras/test/00_create.sh b/extras/test/00_create.sh
index b610300..1aae78f 100644
--- a/extras/test/00_create.sh
+++ b/extras/test/00_create.sh
@@ -11,7 +11,7 @@ test_expect_success 'Testing tomb creation: dig, forge and lock' '
     tt_forge --tomb-pwd $DUMMYPASS &&
     print $DUMMYPASS \
         | gpg --batch --passphrase-fd 0 --no-tty --no-options -d $tomb_key \
-        | hexdump -C &&
+        | xxd &&
     tt_lock --tomb-pwd $DUMMYPASS
     '
 
@@ -22,7 +22,7 @@ if test_have_prereq SPHINX ORACLE; then
         tt_forge --tomb-pwd $DUMMYPASS --sphx-user $DUMMYUSER --sphx-host $DUMMYHOST &&
         print $(echo $DUMMYPASS | sphinx get $DUMMYUSER $DUMMYHOST) \
             | gpg --batch --passphrase-fd 0 --no-tty --no-options -d $tomb_key \
-            | hexdump -C &&
+            | xxd &&
         tt_lock --tomb-pwd $DUMMYPASS --sphx-user $DUMMYUSER --sphx-host $DUMMYHOST
         '
 fi
@@ -34,7 +34,7 @@ if test_have_prereq DOAS; then
         tt_forge --sudo doas --tomb-pwd $DUMMYPASS &&
         print $DUMMYPASS \
             | gpg --batch --passphrase-fd 0 --no-tty --no-options -d $tomb_key \
-            | hexdump -C &&
+            | xxd &&
         tt_lock --sudo doas --tomb-pwd $DUMMYPASS
         '
 fi
diff --git a/extras/test/30_kdf.sh b/extras/test/30_kdf.sh
index be038ff..f9bb329 100644
--- a/extras/test/30_kdf.sh
+++ b/extras/test/30_kdf.sh
@@ -11,7 +11,7 @@ if test_have_prereq KDF; then
         tt_forge --tomb-pwd $DUMMYPASS --kdf 1 &&
         print $DUMMYPASS \
             | gpg --batch --passphrase-fd 0 --no-tty --no-options -d $tomb_key \
-            | hexdump -C &&
+            | xxd &&
         tt_lock --tomb-pwd $DUMMYPASS --kdf 1
         '
 
diff --git a/extras/test/90_setkey.sh b/extras/test/90_setkey.sh
index 6dc53fa..737a012 100755
--- a/extras/test/90_setkey.sh
+++ b/extras/test/90_setkey.sh
@@ -14,7 +14,7 @@ test_expect_success 'Testing set key' '
         --unsafe --tomb-pwd $DUMMYPASS &&
     print $DUMMYPASS \
         | gpg --batch --passphrase-fd 0 --no-tty --no-options -d $tomb_key_new \
-        | hexdump -C &&
+        | xxd &&
     tt_close
     '
 
@@ -40,7 +40,7 @@ if test_have_prereq SPHINX ORACLE; then
             --sphx-user $DUMMYUSER --sphx-host $DUMMYHOST &&
         print $DUMMYPASS \
             | gpg --batch --passphrase-fd 0 --no-tty --no-options -d $tomb_key_new \
-            | hexdump -C &&
+            | xxd &&
         tt_close
         '
 fi
diff --git a/extras/test/Dockerfile b/extras/test/Dockerfile
index e489bc9..6e6fc68 100644
--- a/extras/test/Dockerfile
+++ b/extras/test/Dockerfile
@@ -1,9 +1,8 @@
-FROM dyne/devuan:beowulf
+FROM dyne/devuan:chimaera
 
 RUN echo "deb http://deb.devuan.org/merged chimaera main" >> /etc/apt/sources.list
 RUN apt-get update -y -q --allow-releaseinfo-change
-RUN apt-get install -y -q -t beowulf zsh cryptsetup gawk libgcrypt20-dev steghide qrencode python python2.7 python3-pip python3-dev libssl-dev make gcc g++ sudo gettext file bsdmainutils
-RUN apt-get install -y -q -t chimaera libsodium23 libsodium-dev doas
+RUN apt-get install -y -q zsh cryptsetup gpg gawk libgcrypt20-dev steghide qrencode python python2.7 python3-pip python3-dev libssl-dev make gcc sudo gettext bsdmainutils file pinentry-curses xxd libsodium23 libsodium-dev doas
 RUN pip3 install setuptools wheel
 
 COPY . /Tomb/
diff --git a/extras/test/runtests b/extras/test/runtests
index 0792ffe..8f0d140 100755
--- a/extras/test/runtests
+++ b/extras/test/runtests
@@ -100,7 +100,7 @@ test-tomb-create() {
         notice "Dump of clear key contents to examine them:"
         print ${dummypass} \
 	        | gpg --batch --passphrase-fd 0 --no-tty --no-options -d /tmp/test.tomb.key \
-	        | hexdump -C
+	        | xxd
         echo --
     }
 
@@ -309,7 +309,7 @@ test-set-key() {
         notice "Dump of clear key contents to examine them:"
         print ${dummypass} \
 	        | gpg --batch --passphrase-fd 0 --no-tty --no-options -d /tmp/test.tomb.new.key \
-	        | hexdump -C
+	        | xxd
         echo --
         mv /tmp/test.tomb.new.key /tmp/test.tomb.key
         tt close test