diff --git a/tests/test_build_html.py b/tests/test_build_html.py
index e467c1de7..51e6bd4d3 100644
--- a/tests/test_build_html.py
+++ b/tests/test_build_html.py
@@ -37,7 +37,7 @@ HTML_WARNINGS = ENV_WARNINGS + """\
 %(root)s/index.rst:\\d+: WARNING: unknown option: '&option'
 %(root)s/index.rst:\\d+: WARNING: citation not found: missing
 %(root)s/index.rst:\\d+: WARNING: a suitable image for html builder not found: foo.\\*
-%(root)s/index.rst:\\d+: WARNING: Could not lex literal_block .* as "c". Highlighting skipped.
+%(root)s/index.rst:\\d+: WARNING: Lexing literal_block ".*" as "c" resulted in an error at token: ".*". Retrying in relaxed mode.
 """
 
 
diff --git a/tests/test_build_latex.py b/tests/test_build_latex.py
index e6bd97942..27088be08 100644
--- a/tests/test_build_latex.py
+++ b/tests/test_build_latex.py
@@ -37,7 +37,7 @@ LATEX_WARNINGS = ENV_WARNINGS + """\
 %(root)s/index.rst:\\d+: WARNING: unknown option: '&option'
 %(root)s/index.rst:\\d+: WARNING: citation not found: missing
 %(root)s/index.rst:\\d+: WARNING: a suitable image for latex builder not found: foo.\\*
-%(root)s/index.rst:\\d+: WARNING: Could not lex literal_block .* as "c". Highlighting skipped.
+%(root)s/index.rst:\\d+: WARNING: Lexing literal_block ".*" as "c" resulted in an error at token: ".*". Retrying in relaxed mode.
 """