diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9f6862151..ded678001 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -57,14 +57,14 @@ jobs:
           FILES=$(echo '${{ steps.filter.outputs.parsers_files }}' | jq -r '.[]')
 
           # Extract unique parser directories from both src and tests
-          SRC_PARSERS=$(echo "$FILES" | grep '^src/allotropy/parsers/' | cut -d'/' -f4 | grep -v '^utils$' | grep -v '^__pycache__$')
-          TEST_PARSERS=$(echo "$FILES" | grep '^tests/parsers/' | cut -d'/' -f3 | grep -v '^__pycache__$')
+          SRC_PARSERS=$(echo "$FILES" | grep '^src/allotropy/parsers/' | cut -d'/' -f4 | grep -v '^utils$' | grep -v '^__pycache__$' || true)
+          TEST_PARSERS=$(echo "$FILES" | grep '^tests/parsers/' | cut -d'/' -f3 | grep -v '^__pycache__$' || true)
 
           # Combine and get unique parsers
-          ALL_PARSERS=$(echo -e "$SRC_PARSERS\n$TEST_PARSERS" | sort -u | grep -v '^$')
+          ALL_PARSERS=$(echo -e "$SRC_PARSERS\n$TEST_PARSERS" | sort -u | grep -v '^$' || true)
 
           # Count unique parsers
-          PARSER_COUNT=$(echo "$ALL_PARSERS" | grep -v '^$' | wc -l)
+          PARSER_COUNT=$(echo "$ALL_PARSERS" | grep -v '^$' | wc -l || echo "0")
 
           if [[ $PARSER_COUNT -eq 1 ]]; then
             PARSER=$(echo "$ALL_PARSERS" | head -n1)
diff --git a/src/allotropy/parsers/thermo_skanit/thermo_skanit_structure.py b/src/allotropy/parsers/thermo_skanit/thermo_skanit_structure.py
index da2fc6e04..01f6dbfc9 100644
--- a/src/allotropy/parsers/thermo_skanit/thermo_skanit_structure.py
+++ b/src/allotropy/parsers/thermo_skanit/thermo_skanit_structure.py
@@ -321,6 +321,7 @@ def create(
         plate_well_counts: dict[str, int] = {}
 
         for plate in plates:
+            plate_well_count = 0  # Initialize to 0 in case no valid data is found
             for wavelength, data_df in plate.wavelength_data.items():
                 if data_df.empty:
                     continue