diff --git a/docs/development.md b/docs/development.md
index fa40718..d048b0d 100644
--- a/docs/development.md
+++ b/docs/development.md
@@ -242,7 +242,7 @@ require `gofmt` as well as [revive](https://github.com/mgechev/revive).
 A custom tool called `implements` is available under `contrib/implements`. This
 tool is designed to help compare what is available in ceph vs. go-ceph. It
 checks both the "Implements" sections in the comments as well as the code
-itself. It requires the [castxml](https://github.com/CastXML/CastXML) CLI tool.
+itself.
 
 
 ## Contribution Guidelines
diff --git a/entrypoint.sh b/entrypoint.sh
index 8a11c31..856cc60 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -241,15 +241,13 @@ pre_all_tests() {
 }
 
 implements_tool() {
-    if command -v castxml >/dev/null ; then
-        mkdir -p "${RESULTS_DIR}"
-        show ./implements --list \
-            --report-json "${RESULTS_DIR}/implements.json" \
-            --report-text "${RESULTS_DIR}/implements.txt" \
-            cephfs rados rbd cephfs/admin rbd/admin rgw/admin common/admin/manager
-        # output the brief summary info onto stdout
-        grep '^[A-Z]' "${RESULTS_DIR}/implements.txt"
-    fi
+    mkdir -p "${RESULTS_DIR}"
+    show ./implements --list \
+        --report-json "${RESULTS_DIR}/implements.json" \
+        --report-text "${RESULTS_DIR}/implements.txt" \
+        cephfs rados rbd cephfs/admin rbd/admin rgw/admin common/admin/manager
+    # output the brief summary info onto stdout
+    grep '^[A-Z]' "${RESULTS_DIR}/implements.txt"
 }
 
 post_all_tests() {
diff --git a/testing/containers/ceph/Dockerfile b/testing/containers/ceph/Dockerfile
index 022381d..d37c6ae 100644
--- a/testing/containers/ceph/Dockerfile
+++ b/testing/containers/ceph/Dockerfile
@@ -20,7 +20,6 @@ RUN true && \
         git wget curl make \
         /usr/bin/cc /usr/bin/c++ \
         "libcephfs-devel-${cv}" "librados-devel-${cv}" "librbd-devel-${cv}" && \
-    (dnf install -y 'castxml >= 0.4.3' || true) && \
     yum clean all && \
     true