diff --git a/plugins/python-build/bin/pyenv-install-prerequisites b/plugins/python-build/bin/pyenv-install-prerequisites
index 52471ca1..c56bbd98 100755
--- a/plugins/python-build/bin/pyenv-install-prerequisites
+++ b/plugins/python-build/bin/pyenv-install-prerequisites
@@ -7,6 +7,7 @@
 set -e
 [ -n "$PYENV_DEBUG" ] && set -x
 
+# Provide pyenv completions
 if [ "$1" = "--complete" ]; then
   exit
 fi
diff --git a/plugins/python-build/test/install-prerequisites.bats b/plugins/python-build/test/install-prerequisites.bats
index 8df696a3..b827a0e9 100644
--- a/plugins/python-build/test/install-prerequisites.bats
+++ b/plugins/python-build/test/install-prerequisites.bats
@@ -13,9 +13,10 @@ liblzma-dev libzstd-dev"
 @test "completion does not install packages" {
   stub apt-get
 
-  run pyenv-install-prerequisites --complete
+  PATH="${BATS_TEST_DIRNAME}/../../../libexec:$PATH" \
+    run pyenv completions install-prerequisites
 
-  assert_success
+  assert_success "--help"
   unstub apt-get
 }
 
diff --git a/plugins/python-build/test/test_helper.bash b/plugins/python-build/test/test_helper.bash
index a72806ab..5018f623 100644
--- a/plugins/python-build/test/test_helper.bash
+++ b/plugins/python-build/test/test_helper.bash
@@ -148,7 +148,7 @@ path_without() {
       if [ "$found" != "${PYENV_ROOT}/shims" ]; then
         alt="${PYENV_TEST_DIR}/$(echo "${found#/}" | tr '/' '-')"
         mkdir -p "$alt"
-        for util in bash head cut readlink greadlink; do
+        for util in bash head cut readlink greadlink tr; do
           if [ -x "${found}/$util" ]; then
             ln -s "${found}/$util" "${alt}/$util"
           fi