No suitable driver found for jdbc:oracle:thin: in salenium

i'm using salenium test script with testng(testing framework) to run automataion test scenarios on chrome . i need to check few things from database table in the process. i have ojdbc.jar file in my project ..configured in build path . but when i try to run the test case . it'll open the browser and stuck there without procceding further, and it'll give No suitable driver found for jdbc:oracle:thin.... error i tried moving ojdbc.jar file in to lib,jar or other folders..but it doesn't work the URL links i'm using are correct. any help would be great.