diff --git a/Doc/library/colorsys.rst b/Doc/library/colorsys.rst
index dbab706..225306c 100644
--- a/Doc/library/colorsys.rst
+++ b/Doc/library/colorsys.rst
@@ -58,7 +58,7 @@
 Example::
 
    >>> import colorsys
-   >>> colorsys.rgb_to_hsv(.3, .4, .2)
-   (0.25, 0.5, 0.4)
-   >>> colorsys.hsv_to_rgb(0.25, 0.5, 0.4)
-   (0.3, 0.4, 0.2)
+   >>> colorsys.rgb_to_hsv(0.2, 0.4, 0.4)
+   (0.5, 0.5, 0.4)
+   >>> colorsys.hsv_to_rgb(0.5, 0.5, 0.4)
+   (0.2, 0.4, 0.4)
diff --git a/Doc/library/filecmp.rst b/Doc/library/filecmp.rst
index de20fb1..8fd23dd 100644
--- a/Doc/library/filecmp.rst
+++ b/Doc/library/filecmp.rst
@@ -54,9 +54,9 @@
 Example::
 
    >>> import filecmp
-   >>> filecmp.cmp('undoc.rst', 'undoc.rst')
+   >>> filecmp.cmp('undoc.rst', 'undoc.rst') # doctest: +SKIP
    True
-   >>> filecmp.cmp('undoc.rst', 'index.rst')
+   >>> filecmp.cmp('undoc.rst', 'index.rst') # doctest: +SKIP
    False
 
 
@@ -191,6 +191,6 @@
     ...     for sub_dcmp in dcmp.subdirs.values():
     ...         print_diff_files(sub_dcmp)
     ...
-    >>> dcmp = dircmp('dir1', 'dir2')
-    >>> print_diff_files(dcmp)
+    >>> dcmp = dircmp('dir1', 'dir2') # doctest: +SKIP
+    >>> print_diff_files(dcmp) # doctest: +SKIP
 
diff --git a/Doc/library/math.rst b/Doc/library/math.rst
index 98c5b33..5d6f951 100644
--- a/Doc/library/math.rst
+++ b/Doc/library/math.rst
@@ -77,6 +77,8 @@
 
 
 .. function:: fsum(iterable)
+.. testsetup::
+        >>> from math import fsum
 
    Return an accurate floating point sum of values in the iterable.  Avoids
    loss of precision by tracking multiple intermediate partial sums::
diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index d821339..5778980 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -610,7 +610,7 @@
    3232235521
    >>>
    >>> width = 5
-   >>> for num in range(5,12):
+   >>> for num in range(5,12): #doctest: +NORMALIZE_WHITESPACE
    ...     for base in 'dXob':
    ...         print('{0:{width}{base}}'.format(num, base=base, width=width), end=' ')
    ...     print()
@@ -698,7 +698,7 @@
    >>> Template('Give $who $100').substitute(d)
    Traceback (most recent call last):
    [...]
-   ValueError: Invalid placeholder in string: line 1, col 10
+   ValueError: Invalid placeholder in string: line 1, col 11
    >>> Template('$who likes $what').substitute(d)
    Traceback (most recent call last):
    [...]