diff --git a/conventional-pre-commit.sh b/conventional-pre-commit.sh
index 7deeb11..78f834f 100755
--- a/conventional-pre-commit.sh
+++ b/conventional-pre-commit.sh
@@ -25,7 +25,7 @@ r_scope="(\([[:alnum:] \/-]+\))?"
 # optional breaking change indicator and colon delimiter
 r_delim='!?:'
 # subject line, body, footer
-r_subject=" [[:alnum:]].+"
+r_subject=" [[:print:]].+"
 # the full regex pattern
 pattern="^$r_types$r_scope$r_delim$r_subject$"
 
diff --git a/tests.sh b/tests.sh
index 7c12959..75220e3 100755
--- a/tests.sh
+++ b/tests.sh
@@ -27,7 +27,7 @@ teardown () {
     rm -rf "$test_dir"
 }
 
-# test a failure
+echo "test a failure"
 
 setup
 
@@ -39,7 +39,9 @@ echo "$fail" | grep -Eq "Your commit message does not follow Conventional Commit
 
 (( result += "$?" ))
 
-# test a success
+echo "$result"
+
+echo "test a success"
 
 setup
 
@@ -51,4 +53,64 @@ echo "$pass" | grep -Eq "\[main \(root-commit\) [[:alnum:]]{7}\] test: conventio
 
 (( result += "$?" ))
 
+echo "$result"
+
+echo "test printable characters/marks in subject"
+
+echo "test escaped double quote \""
+
+setup
+
+pass="$(git commit -m 'test: conventional-pre-commit "')"
+
+teardown
+
+echo "$pass" | grep -Eq "\[main \(root-commit\) [[:alnum:]]{7}\] test: conventional-pre-commit \""
+
+(( result += "$?" ))
+
+echo "$result"
+
+echo "test backtick \`"
+
+setup
+
+pass="$(git commit -m 'test: conventional-pre-commit `')"
+
+teardown
+
+echo "$pass" | grep -Eq "\[main \(root-commit\) [[:alnum:]]{7}\] test: conventional-pre-commit \`"
+
+(( result += "$?" ))
+
+echo "$result"
+
+echo "test hash/number sign #"
+
+setup
+
+pass="$(git commit -m 'test: conventional-pre-commit #')"
+
+teardown
+
+echo "$pass" | grep -Eq "\[main \(root-commit\) [[:alnum:]]{7}\] test: conventional-pre-commit #"
+
+(( result += "$?" ))
+
+echo "$result"
+
+echo "test ampersand &"
+
+setup
+
+pass="$(git commit -m 'test: conventional-pre-commit &')"
+
+teardown
+
+echo "$pass" | grep -Eq "\[main \(root-commit\) [[:alnum:]]{7}\] test: conventional-pre-commit &"
+
+(( result += "$?" ))
+
+echo "$result"
+
 exit "$result"