diff --git a/test/prefix.bats b/test/prefix.bats
index 5da1a5f8..0cea7aa1 100644
--- a/test/prefix.bats
+++ b/test/prefix.bats
@@ -46,6 +46,6 @@ OUT
 }
 
 @test "prefix for invalid system" {
-  PATH="$(path_without python)" run pyenv-prefix system
+  PATH="$(path_without python python2 python3)" run pyenv-prefix system
   assert_failure "pyenv: system version not found in PATH"
 }
diff --git a/test/test_helper.bash b/test/test_helper.bash
index e11cd8f1..b11d65bd 100644
--- a/test/test_helper.bash
+++ b/test/test_helper.bash
@@ -111,24 +111,26 @@ assert() {
 # Output a modified PATH that ensures that the given executable is not present,
 # but in which system utils necessary for pyenv operation are still available.
 path_without() {
-  local exe="$1"
   local path=":${PATH}:"
-  local found alt util
-  for found in $(which -a "$exe"); do
-    found="${found%/*}"
-    if [ "$found" != "${PYENV_ROOT}/shims" ]; then
-      alt="${PYENV_TEST_DIR}/$(echo "${found#/}" | tr '/' '-')"
-      mkdir -p "$alt"
-      for util in bash head cut readlink greadlink; do
-        if [ -x "${found}/$util" ]; then
-          ln -s "${found}/$util" "${alt}/$util"
-        fi
-      done
-      path="${path/:${found}:/:${alt}:}"
-    fi
+  for exe; do 
+    local found alt util
+    for found in $(PATH="$path" which -a "$exe"); do
+      found="${found%/*}"
+      if [ "$found" != "${PYENV_ROOT}/shims" ]; then
+        alt="${PYENV_TEST_DIR}/$(echo "${found#/}" | tr '/' '-')"
+        mkdir -p "$alt"
+        for util in bash head cut readlink greadlink which; do
+          if [ -x "${found}/$util" ]; then
+            ln -s "${found}/$util" "${alt}/$util"
+          fi
+        done
+        path="${path/:${found}:/:${alt}:}"
+      fi
+    done
   done
   path="${path#:}"
-  echo "${path%:}"
+  path="${path%:}"
+  echo "$path"
 }
 
 create_hook() {
diff --git a/test/versions.bats b/test/versions.bats
index 8ded5c4a..932883c7 100644
--- a/test/versions.bats
+++ b/test/versions.bats
@@ -25,7 +25,7 @@ stub_system_python() {
 }
 
 @test "not even system python available" {
-  PATH="$(path_without python)" run pyenv-versions
+  PATH="$(path_without python python2 python3)" run pyenv-versions
   assert_failure
   assert_output "Warning: no Python detected on the system"
 }