diff --git a/test_problems/.gitignore b/test_problems/.gitignore
index 2bdd55f20..eb0288827 100644
--- a/test_problems/.gitignore
+++ b/test_problems/.gitignore
@@ -2,6 +2,7 @@
 *_output.txt
 *_output.csv
 *_output.out
+*.exe
 ChemEquil_gri_matrix/gri_matrix
 ChemEquil_gri_pairs/gri_pairs
 ChemEquil_ionizedGas/ionizedGasEquil