The paper presents two transit observations of the super-Earth TOI-836b using the JWST NIRSpec/G395H instrument, resulting in a 2.8–5.2 μm transmission spectrum. The observations were conducted on March 4 and March 8, 2023, with a median transit depth precision of 34 ppm for Visit 1 and 36 ppm for Visit 2. Two independent reduction pipelines, ExoTiC-JEDI and Eureka!, were used to process the data, yielding consistent results. The transmission spectra from both visits were well-fit by a zero-sloped line, and combining the data ruled out atmospheres with metallicities < 250×Solar for an opaque pressure level of 0.1 bar, corresponding to mean molecular weights ≤ 6 g mol⁻¹. This suggests that TOI-836b does not have a hydrogen-dominated atmosphere, contrasting with its larger sibling planet, TOI-836c. The study also highlights the importance of caution when planning observations of small planets, especially for high metallicities and planets around bright host stars, as PandExo predictions may be more optimistic than suggested by the gains from additional transits implied by the data.The paper presents two transit observations of the super-Earth TOI-836b using the JWST NIRSpec/G395H instrument, resulting in a 2.8–5.2 μm transmission spectrum. The observations were conducted on March 4 and March 8, 2023, with a median transit depth precision of 34 ppm for Visit 1 and 36 ppm for Visit 2. Two independent reduction pipelines, ExoTiC-JEDI and Eureka!, were used to process the data, yielding consistent results. The transmission spectra from both visits were well-fit by a zero-sloped line, and combining the data ruled out atmospheres with metallicities < 250×Solar for an opaque pressure level of 0.1 bar, corresponding to mean molecular weights ≤ 6 g mol⁻¹. This suggests that TOI-836b does not have a hydrogen-dominated atmosphere, contrasting with its larger sibling planet, TOI-836c. The study also highlights the importance of caution when planning observations of small planets, especially for high metallicities and planets around bright host stars, as PandExo predictions may be more optimistic than suggested by the gains from additional transits implied by the data.