diff --git a/ci/code_checks.sh b/ci/code_checks.sh
index 9f59958b4e827..f481ecf7a97ed 100755
--- a/ci/code_checks.sh
+++ b/ci/code_checks.sh
@@ -121,6 +121,7 @@ if [[ -z "$CHECK" || "$CHECK" == "doctests" ]]; then
       pandas/io/parsers/ \
       pandas/io/sas/ \
       pandas/io/sql.py \
+      pandas/io/formats/format.py \
       pandas/tseries/
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
diff --git a/pandas/io/formats/format.py b/pandas/io/formats/format.py
index 83e0086958b9a..3fd3d84f90161 100644
--- a/pandas/io/formats/format.py
+++ b/pandas/io/formats/format.py
@@ -1956,16 +1956,14 @@ def __call__(self, num: int | float) -> str:
         """
         Formats a number in engineering notation, appending a letter
         representing the power of 1000 of the original number. Some examples:
-
-        >>> format_eng(0)       # for self.accuracy = 0
+        >>> format_eng = EngFormatter(accuracy=0, use_eng_prefix=True)
+        >>> format_eng(0)
         ' 0'
-
-        >>> format_eng(1000000) # for self.accuracy = 1,
-                                #     self.use_eng_prefix = True
+        >>> format_eng = EngFormatter(accuracy=1, use_eng_prefix=True)
+        >>> format_eng(1_000_000)
         ' 1.0M'
-
-        >>> format_eng("-1e-6") # for self.accuracy = 2
-                                #     self.use_eng_prefix = False
+        >>> format_eng = EngFormatter(accuracy=2, use_eng_prefix=False)
+        >>> format_eng("-1e-6")
         '-1.00E-06'
 
         @param num: the value to represent