Test busbar for solar cells

The invention relates to a test busbar (10) for releasably electrically contacting an electrically conductive substrate, in particular a busbar-free solar cell, comprising: an elongated sheet-like base body (2) having a plurality of contact elements (3) arranged on one side thereof and formed integrally with the base body; wherein the contact elements (3) each have a linear contact section (4) arranged on the end side, which contact section (4) extends with a predefined length (L1) parallel to the longitudinal extension direction (L) of the base body (2); and a spring element (5) arranged between the base body (2) and the contact section (4), the spring element (5) extending substantially perpendicular to a longitudinal extension direction (L) of the base body (2) in a meandering manner between the base body (2) and the contact section (4) and in a plane with the base body (2), the width extension (B) of the spring element (5) parallel to the longitudinal extension direction (L) of the base body (2) is greate