diff --git a/tests/one.sh b/tests/one.sh
index 9d207e3..a062d6d 100755
--- a/tests/one.sh
+++ b/tests/one.sh
@@ -2,19 +2,42 @@
 set -ueo pipefail
 
 SCRIPT_DIR=$(dirname $(readlink -f "$0"))
-DB_FILE="${SCRIPT_DIR}/test.db"
+DB_FILE="test.db"
 
-setUp() {
-    tag init "$DB_FILE"
+oneTimeSetUp() {
+    tag --db "$DB_FILE" init >/dev/null
 }
 
-tearDown() {
+oneTimeTearDown() {
+    # need to check if file exists
+    # because of bug in shunit2 that
+    # runs one-time teardown two times
+    # see https://github.com/kward/shunit2/issues/112
     [ -f "$DB_FILE" ] && rm "$DB_FILE"
 }
 
-
 testDbCreated() {
     assertTrue "[[ -f \"$DB_FILE\" ]]"
 }
 
-. ../../shunit2/shunit2
\ No newline at end of file
+testTagAdded() {
+    tag --db "$DB_FILE" add tag hello >/dev/null
+    RESULT=$(sqlite3 "$DB_FILE" "SELECT label from tags WHERE label = 'hello'")
+    assertEquals $RESULT "hello"
+}
+
+testFilenameAdded() {
+    local FILENAME="test.mp4"
+    tag --db "$DB_FILE" add path "$FILENAME" >/dev/null
+    RESULT=$(sqlite3 "$DB_FILE" "SELECT filename from files WHERE filename = '$FILENAME'")
+    assertEquals "$RESULT" "$FILENAME"
+}
+
+testHashAdded() {
+    local HASH="fbe2153ce0614d76a378b2e6fe07cc9e"
+    tag --db "$DB_FILE" add hash "$HASH" >/dev/null
+    RESULT=$(sqlite3 "$DB_FILE" "SELECT md5 from hashes WHERE hash = '$HASH'")
+    assertEquals "$RESULT" "$HASH"
+}
+
+. ../shunit2/shunit2
\ No newline at end of file