diff --git a/test/sedfile.bats b/test/sedfile.bats
new file mode 100644
index 00000000..35c57142
--- /dev/null
+++ b/test/sedfile.bats
@@ -0,0 +1,71 @@
+load 'test_helper/common'
+
+# prepare tests
+function setup_file() {
+  export CONTAINER_START FILE SEDFILE
+  FILE=$(mktemp /tmp/sedfile-test.XXX)
+  SEDFILE="/tmp/sedfile"
+
+  # workaround, /CONTAINER_START cannot be used (permission denied)
+  CONTAINER_START="/tmp/CONTAINER_START"
+  cp -a "target/bin/sedfile" "${SEDFILE}"
+  sed -i "s|/CONTAINER_START|${CONTAINER_START}|" "${SEDFILE}"
+
+  # create test file
+  echo 'foo bar' > "${FILE}"
+}
+
+@test "checking sedfile parameter count" {
+  run ${SEDFILE}
+  assert_failure
+  assert_output --partial 'Error:  At least, three parameters must be given.'
+}
+
+@test "checking sedfile substitute success" {
+  # change 'bar' to 'baz'
+  run ${SEDFILE} -i 's|bar|baz|' "${FILE}"
+  assert_success
+  assert_output ""
+
+  # file modified?
+  run test "$(< "${FILE}")" == 'foo baz'
+  assert_success
+}
+
+@test "checking sedfile substitute failure" {
+  run ${SEDFILE} -i 's|bar|baz|' "${FILE}"
+  assert_failure
+  assert_output --partial "Error: sed -i s|bar|baz| /tmp/sedfile-test."
+
+  # file unchanged?
+  run test "$(< "${FILE}")" == 'foo baz'
+  assert_success
+}
+
+@test "checking sedfile silent failure on substitute" {
+  # create marker to simulate a container restart
+  date > "${CONTAINER_START}"
+
+  run ${SEDFILE} -i 's|bar|baz|' "${FILE}"
+  assert_success
+  assert_output ""
+
+  # file unchanged?
+  run test "$(< "${FILE}")" == 'foo baz'
+  assert_success
+}
+
+@test "checking sedfile substitude failure (strict)" {
+  run ${SEDFILE} --strict -i 's|bar|baz|' "${FILE}"
+  assert_failure
+  assert_output --partial "Error: sed -i s|bar|baz| /tmp/sedfile-test."
+
+  # file unchanged?
+  run test "$(< "${FILE}")" == 'foo baz'
+  assert_success
+}
+
+# clean up
+function teardown_file() {
+  rm -f "${CONTAINER_START}" "${FILE}" "${SEDFILE}"
+}