The present invention extends to methods, systems, and computer program products for testing proximity card readers. Aspects include proximity card reader test bed environments configured to test proximity card readers with a plurality of proximity cards while minimizing human involvement. A proximity card reader can be tested to determine a likelihood of the proximity card reader functioning as intended over time and to determine proximity card reader compatibility with different proximity card formats. Proximity card reader failures (e.g., crashes) and incompatibilities can be detected in the testbed environment reducing the likelihood of deploying defective and/or incompatible card readers into operation.