diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 7d5a97ca..87934df4 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -36,11 +36,13 @@ jobs:
 
       - name: Rust unit tests
         if: ${{ github.repository == 'nrel/fastsim' }}
+        if: ${{ contains(github.event.pull_request.changed_files, 'rust/') }}
         run: |
           cd rust/ && cargo test
 
       - name: Python unit tests 
         if: ${{ github.repository == 'nrel/fastsim' }}
+        if: ${{ contains(github.event.pull_request.changed_files, 'python/') || contains(github.event.pull_request.changed_files, 'rust/') }}
         run: |
           pip install -e ".[dev]" && pytest -v python/fastsim/tests/ 
           pytest -v python/fastsim/demos/
\ No newline at end of file
diff --git a/rust/fastsim-core/src/simdrive.rs b/rust/fastsim-core/src/simdrive.rs
index b5aac40e..c37b1f8a 100644
--- a/rust/fastsim-core/src/simdrive.rs
+++ b/rust/fastsim-core/src/simdrive.rs
@@ -20,7 +20,7 @@ pub mod simdrive_iter;
 /// Struct containing time trace data
 pub struct RustSimDriveParams {
     pub favor_grade_accuracy: bool,
-    pub missed_trace_correction: bool, // if true, missed trace correction is active, default = false
+    pub missed_trace_correction: bool, // If true, missed trace correction is active, default = false
     pub max_time_dilation: f64,
     pub min_time_dilation: f64,
     pub time_dilation_tol: f64,