diff --git a/t/t0040-parse-options.sh b/t/t0040-parse-options.sh
index 03dbe00102..e38241c80a 100755
--- a/t/t0040-parse-options.sh
+++ b/t/t0040-parse-options.sh
@@ -47,6 +47,7 @@ test_expect_success 'test help' '
 cat > expect << EOF
 boolean: 2
 integer: 1729
+timestamp: 0
 string: 123
 abbrev: 7
 verbose: 2
@@ -63,6 +64,7 @@ test_expect_success 'short options' '
 cat > expect << EOF
 boolean: 2
 integer: 1729
+timestamp: 0
 string: 321
 abbrev: 10
 verbose: 2
@@ -88,6 +90,7 @@ test_expect_success 'missing required value' '
 cat > expect << EOF
 boolean: 1
 integer: 13
+timestamp: 0
 string: 123
 abbrev: 7
 verbose: 0
@@ -108,6 +111,7 @@ test_expect_success 'intermingled arguments' '
 cat > expect << EOF
 boolean: 0
 integer: 2
+timestamp: 0
 string: (not set)
 abbrev: 7
 verbose: 0
@@ -135,6 +139,7 @@ test_expect_success 'ambiguously abbreviated option' '
 cat > expect << EOF
 boolean: 0
 integer: 0
+timestamp: 0
 string: 123
 abbrev: 7
 verbose: 0
@@ -161,6 +166,7 @@ test_expect_success 'detect possible typos' '
 cat > expect <<EOF
 boolean: 0
 integer: 0
+timestamp: 0
 string: (not set)
 abbrev: 7
 verbose: 0
@@ -177,7 +183,8 @@ test_expect_success 'keep some options as arguments' '
 
 cat > expect <<EOF
 boolean: 0
-integer: 1
+integer: 0
+timestamp: 1
 string: default
 abbrev: 7
 verbose: 0
@@ -197,6 +204,7 @@ cat > expect <<EOF
 Callback: "four", 0
 boolean: 5
 integer: 4
+timestamp: 0
 string: (not set)
 abbrev: 7
 verbose: 0
@@ -223,6 +231,7 @@ test_expect_success 'OPT_CALLBACK() and callback errors work' '
 cat > expect <<EOF
 boolean: 1
 integer: 23
+timestamp: 0
 string: (not set)
 abbrev: 7
 verbose: 0
diff --git a/test-parse-options.c b/test-parse-options.c
index 2a79e729a4..6e18083a7d 100644
--- a/test-parse-options.c
+++ b/test-parse-options.c
@@ -2,7 +2,8 @@
 #include "parse-options.h"
 
 static int boolean = 0;
-static unsigned long integer = 0;
+static int integer = 0;
+static unsigned long timestamp;
 static int abbrev = 7;
 static int verbose = 0, dry_run = 0, quiet = 0;
 static char *string = NULL;
@@ -32,7 +33,7 @@ int main(int argc, const char **argv)
 		OPT_INTEGER('i', "integer", &integer, "get a integer"),
 		OPT_INTEGER('j', NULL, &integer, "get a integer, too"),
 		OPT_SET_INT(0, "set23", &integer, "set integer to 23", 23),
-		OPT_DATE('t', NULL, &integer, "get timestamp of <time>"),
+		OPT_DATE('t', NULL, &timestamp, "get timestamp of <time>"),
 		OPT_CALLBACK('L', "length", &integer, "str",
 			"get length of <str>", length_callback),
 		OPT_GROUP("String options"),
@@ -56,7 +57,8 @@ int main(int argc, const char **argv)
 	argc = parse_options(argc, argv, options, usage, 0);
 
 	printf("boolean: %d\n", boolean);
-	printf("integer: %lu\n", integer);
+	printf("integer: %u\n", integer);
+	printf("timestamp: %lu\n", timestamp);
 	printf("string: %s\n", string ? string : "(not set)");
 	printf("abbrev: %d\n", abbrev);
 	printf("verbose: %d\n", verbose);