diff --git a/regress/hooks.sh b/regress/hooks.sh
index e99b2e768..96a5064d0 100644
--- a/regress/hooks.sh
+++ b/regress/hooks.sh
@@ -85,6 +85,11 @@ echo "$shown" | grep -q '^session-created\[0\]' ||
 	fail "missing first array item: $shown"
 echo "$shown" | grep -q '^session-created\[1\]' ||
 	fail "missing second array item: $shown"
+shown=$($TMUX show-hooks -gF '#{option_name}:#{hook_fire_count}:#{t/p:hook_fire_time}' \
+	session-created) ||
+	fail "show-hooks -gF failed"
+echo "$shown" | grep -q '^session-created:[1-9][0-9]*:[^-][^ ]*$' ||
+	fail "missing hook fire formats: $shown"
 
 # User hooks are options, but show-hooks should list only registered @ hooks
 # and not ordinary user options.
diff --git a/regress/set-hook-B.sh b/regress/set-hook-B.sh
index a6b93ce04..11f8d7f86 100644
--- a/regress/set-hook-B.sh
+++ b/regress/set-hook-B.sh
@@ -81,6 +81,11 @@ assert_unchanged @seen 0
 
 $TMUX rename-session two || fail "rename-session two failed"
 wait_for @seen '@session-name:two'
+shown=$($TMUX show-hooks -g -BF '#{hook_fire_count}:#{t/p:hook_fire_time}' \
+	@session-name) ||
+	fail "show-hooks -BF fire failed"
+echo "$shown" | grep -q '^1:[^-][^ ]*$' ||
+	fail "unexpected show-hooks -BF fire output: $shown"
 
 $TMUX set -g @seen-last 0 || fail "set @seen-last failed"
 $TMUX set-hook -g -B '@session-name::#{session_name}' \