diff --git a/src/ert/resources/workflows/jobs/internal-gui/scripts/csv_export.py b/src/ert/resources/workflows/jobs/internal-gui/scripts/csv_export.py
index bb93b7508fa..a9f75831923 100644
--- a/src/ert/resources/workflows/jobs/internal-gui/scripts/csv_export.py
+++ b/src/ert/resources/workflows/jobs/internal-gui/scripts/csv_export.py
@@ -115,7 +115,7 @@ def run(
         if drop_const_cols:
             data = data.loc[:, (data != data.iloc[0]).any()]
 
-        data.to_csv(output_file)
+        data.to_csv(output_file, float_format="%.6f")
 
         export_info = (
             f"Exported {len(data.index)} rows and {len(data.columns)} "
diff --git a/tests/ert/ui_tests/gui/test_csv_export.py b/tests/ert/ui_tests/gui/test_csv_export.py
index e7d523b4c9b..b40cbb0c2b1 100644
--- a/tests/ert/ui_tests/gui/test_csv_export.py
+++ b/tests/ert/ui_tests/gui/test_csv_export.py
@@ -73,7 +73,7 @@ def verify_exported_content(file_name, gui, ensemble_select):
 
         for i in range(ensemble.ensemble_size):
             assert (
-                f",{name},{gen_kw_data.iloc[i]['COEFFS:a']},{gen_kw_data.iloc[i]['COEFFS:b']},{gen_kw_data.iloc[i]['COEFFS:c']},{misfit_data.iloc[i]['MISFIT:POLY_OBS']},{misfit_data.iloc[i]['MISFIT:TOTAL']}"
+                f",{name},{gen_kw_data.iloc[i]['COEFFS:a']:.6f},{gen_kw_data.iloc[i]['COEFFS:b']:.6f},{gen_kw_data.iloc[i]['COEFFS:c']:.6f},{misfit_data.iloc[i]['MISFIT:POLY_OBS']:.6f},{misfit_data.iloc[i]['MISFIT:TOTAL']:.6f}"
                 in file_content
             )