diff --git a/src/tests/e2e-test b/src/tests/e2e-test
index ee0dcd2..65c62af 100755
--- a/src/tests/e2e-test
+++ b/src/tests/e2e-test
@@ -57,42 +57,6 @@ test_exitstatus()
 }
 
 
-# Tmux check.
-tmux_check()
-{
-    # OpenBSD tmux does not have '-V'.
-    if [ "$(uname -s)" = "OpenBSD" ]; then
-	openbsd_major="$(uname -r)"
-	openbsd_major="${openbsd_major%%.*}"
-	if [ "${openbsd_major}" -ge 6 ]; then
-	    return 0
-	fi
-    fi
-    version=$(tmux -V)
-    if [ $? != 0 ]; then
-	error "tmux unavailable\n"
-	return 1
-    fi
-    if [ "$version" = "tmux master" ]; then
-	return 0
-    fi
-    version=${version##tmux }
-    version_major=${version%%.*}
-    version_minor=${version##*.}
-    # need version 1.8 for capture-pane
-    if [ "$version_major" -lt 1 ] ||
-	{ [ "$version_major" -eq 1 ] && [ "$version_minor" -lt 8 ]; }; then
-	error "tmux version %s too old\n" "$version"
-	return 1
-    fi
-    # Finally, check that tmux actually works to some degree.
-    #
-    # Use a different socket name.  On Cygwin, this tmux server is
-    # slow to exit, and the actual test tmux can attach to it, causing
-    # problems with missing environment variables.
-    tmux -f /dev/null -S "${tmux_socket}c" -C new-session true
-}
-
 ssh_localhost_check()
 {
     ssh localhost :
@@ -169,7 +133,8 @@ fi
 # XXX this ignores $TMPDIR, because it results in an overlong pathname on OS X
 tmux_socket="/tmp/.tmux-mosh-test-$$"
 
-if ! tmux_check; then
+# need version 1.8 for capture-pane
+if ! tmux_check 1 8; then
     test_skipped "tmux unavailable\n"
 fi
 
diff --git a/src/tests/e2e-test-subrs b/src/tests/e2e-test-subrs
index 958c9b7..b033ed8 100644
--- a/src/tests/e2e-test-subrs
+++ b/src/tests/e2e-test-subrs
@@ -80,3 +80,41 @@ set_locale()
     # Fail.
     return 1
 }
+
+# Tmux check.
+tmux_check()
+{
+    need_major="$1"; shift
+    need_minor="$1"; shift
+    # OpenBSD tmux does not have '-V'.
+    if [ "$(uname -s)" = "OpenBSD" ]; then
+	openbsd_major="$(uname -r)"
+	openbsd_major="${openbsd_major%%.*}"
+	if [ "${openbsd_major}" -ge 6 ]; then
+	    return 0
+	fi
+    fi
+    version=$(tmux -V)
+    if [ $? != 0 ]; then
+	error "tmux unavailable\n"
+	return 1
+    fi
+    if [ "$version" = "tmux master" ]; then
+	return 0
+    fi
+    version=${version##tmux }
+    version_major=${version%%.*}
+    version_minor=${version##*.}
+
+    if [ "$version_major" -lt "$need_major" ] ||
+	{ [ "$version_major" -eq "$need_major" ] && [ "$version_minor" -lt "$need_minor" ]; }; then
+	printf "tmux version %s too old\n" "$version" >&2
+	return 1
+    fi
+    # Finally, check that tmux actually works to some degree.
+    #
+    # Use a different socket name.  On Cygwin, this tmux server is
+    # slow to exit, and the actual test tmux can attach to it, causing
+    # problems with missing environment variables.
+    tmux -f /dev/null -S "${tmux_socket}c" -C new-session true
+}
diff --git a/src/tests/emulation-attributes.test b/src/tests/emulation-attributes.test
index e633f5c..dbc413c 100755
--- a/src/tests/emulation-attributes.test
+++ b/src/tests/emulation-attributes.test
@@ -14,6 +14,13 @@
 # shellcheck source=e2e-test-subrs
 . "$(dirname "$0")/e2e-test-subrs"
 PATH=$PATH:.:$srcdir
+# Need 2.3 for true-color support (2.2 may work also)
+if [ "$(basename "$0")" = emulation-attributes-truecolor.test ] &&
+   ! tmux_check 2 3; then
+    printf "tmux does not support true color\n" >&2
+    exit 77
+fi
+
 # Top-level wrapper.
 if [ $# -eq 0 ]; then
     e2e-test "$0" baseline direct verify