# [Codecov](https://codecov.io/gh/apache/incubator-airflow/pull/3991?src=pr&el=h1) Report > Merging > [#3991](https://codecov.io/gh/apache/incubator-airflow/pull/3991?src=pr&el=desc) > into > [master](https://codecov.io/gh/apache/incubator-airflow/commit/b85210d8596c1e05fbf3da2941aaca8170ae871e?src=pr&el=desc) > will **increase** coverage by `0.26%`. > The diff coverage is `100%`.
[](https://codecov.io/gh/apache/incubator-airflow/pull/3991?src=pr&el=tree) ```diff @@ Coverage Diff @@ ## master #3991 +/- ## ========================================== + Coverage 75.49% 75.76% +0.26% ========================================== Files 199 199 Lines 15946 15942 -4 ========================================== + Hits 12038 12078 +40 + Misses 3908 3864 -44 ``` | [Impacted Files](https://codecov.io/gh/apache/incubator-airflow/pull/3991?src=pr&el=tree) | Coverage Δ | | |---|---|---| | [airflow/sensors/sql\_sensor.py](https://codecov.io/gh/apache/incubator-airflow/pull/3991/diff?src=pr&el=tree#diff-YWlyZmxvdy9zZW5zb3JzL3NxbF9zZW5zb3IucHk=) | `100% <100%> (+9.52%)` | :arrow_up: | | [airflow/sensors/s3\_key\_sensor.py](https://codecov.io/gh/apache/incubator-airflow/pull/3991/diff?src=pr&el=tree#diff-YWlyZmxvdy9zZW5zb3JzL3MzX2tleV9zZW5zb3IucHk=) | `100% <100%> (+69.69%)` | :arrow_up: | | [airflow/models.py](https://codecov.io/gh/apache/incubator-airflow/pull/3991/diff?src=pr&el=tree#diff-YWlyZmxvdy9tb2RlbHMucHk=) | `91.71% <0%> (+0.04%)` | :arrow_up: | | [airflow/sensors/s3\_prefix\_sensor.py](https://codecov.io/gh/apache/incubator-airflow/pull/3991/diff?src=pr&el=tree#diff-YWlyZmxvdy9zZW5zb3JzL3MzX3ByZWZpeF9zZW5zb3IucHk=) | `100% <0%> (+100%)` | :arrow_up: | ------ [Continue to review full report at Codecov](https://codecov.io/gh/apache/incubator-airflow/pull/3991?src=pr&el=continue). > **Legend** - [Click here to learn > more](https://docs.codecov.io/docs/codecov-delta) > `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data` > Powered by > [Codecov](https://codecov.io/gh/apache/incubator-airflow/pull/3991?src=pr&el=footer). > Last update > [b85210d...6801ce7](https://codecov.io/gh/apache/incubator-airflow/pull/3991?src=pr&el=lastupdated). > Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments). [ Full content available at: https://github.com/apache/incubator-airflow/pull/3991 ] This message was relayed via gitbox.apache.org for devnull@infra.apache.org