diff --git a/dir.c b/dir.c
index 29d1d5ba31..109e05b013 100644
--- a/dir.c
+++ b/dir.c
@@ -54,7 +54,7 @@ int common_prefix(const char **pathspec)
 
 static inline int special_char(unsigned char c1)
 {
-	return !c1 || c1 == '*' || c1 == '[' || c1 == '?';
+	return !c1 || c1 == '*' || c1 == '[' || c1 == '?' || c1 == '\\';
 }
 
 /*
diff --git a/t/t3700-add.sh b/t/t3700-add.sh
index 7d123d17fc..77a782c9ad 100755
--- a/t/t3700-add.sh
+++ b/t/t3700-add.sh
@@ -222,4 +222,12 @@ test_expect_success 'git add (add.ignore-errors = false)' '
 	! ( git ls-files foo1 | grep foo1 )
 '
 
+test_expect_success 'git add '\''fo\?bar'\'' ignores foobar' '
+	git reset --hard &&
+	touch fo\?bar foobar &&
+	git add '\''fo\?bar'\'' &&
+	git ls-files fo\?bar | grep -F fo\?bar &&
+	! ( git ls-files foobar | grep foobar )
+'
+
 test_done
diff --git a/t/t5304-prune.sh b/t/t5304-prune.sh
index 9fd9d07000..771c0a06a4 100755
--- a/t/t5304-prune.sh
+++ b/t/t5304-prune.sh
@@ -21,7 +21,7 @@ test_expect_success 'prune stale packs' '
 	orig_pack=$(echo .git/objects/pack/*.pack) &&
 	: > .git/objects/tmp_1.pack &&
 	: > .git/objects/tmp_2.pack &&
-	test-chmtime -86501 .git/objects/tmp_1.pack &&
+	test-chmtime =-86501 .git/objects/tmp_1.pack &&
 	git prune --expire 1.day &&
 	test -f $orig_pack &&
 	test -f .git/objects/tmp_2.pack &&
@@ -39,7 +39,7 @@ test_expect_success 'prune --expire' '
 	git prune --expire=1.hour.ago &&
 	test $((1 + $before)) = $(git count-objects | sed "s/ .*//") &&
 	test -f $BLOB_FILE &&
-	test-chmtime -86500 $BLOB_FILE &&
+	test-chmtime =-86500 $BLOB_FILE &&
 	git prune --expire 1.day &&
 	test $before = $(git count-objects | sed "s/ .*//") &&
 	! test -f $BLOB_FILE
@@ -53,11 +53,11 @@ test_expect_success 'gc: implicit prune --expire' '
 	BLOB_FILE=.git/objects/$(echo $BLOB | sed "s/^../&\//") &&
 	test $((1 + $before)) = $(git count-objects | sed "s/ .*//") &&
 	test -f $BLOB_FILE &&
-	test-chmtime -$((86400*14-30)) $BLOB_FILE &&
+	test-chmtime =-$((86400*14-30)) $BLOB_FILE &&
 	git gc &&
 	test $((1 + $before)) = $(git count-objects | sed "s/ .*//") &&
 	test -f $BLOB_FILE &&
-	test-chmtime -$((86400*14+1)) $BLOB_FILE &&
+	test-chmtime =-$((86400*14+1)) $BLOB_FILE &&
 	git gc &&
 	test $before = $(git count-objects | sed "s/ .*//") &&
 	! test -f $BLOB_FILE