diff --git a/cmd/tools/vtest-self.v b/cmd/tools/vtest-self.v
index 0d437dd36b..e8e8198498 100644
--- a/cmd/tools/vtest-self.v
+++ b/cmd/tools/vtest-self.v
@@ -8,6 +8,23 @@ const (
 	skip_test_files               = [
 		'vlib/context/deadline_test.v' /* sometimes blocks */,
 	]
+	skip_fsanitize_too_slow       = [
+		// These tests are too slow to be run in the CI on each PR/commit
+		// in the sanitized modes:
+		'vlib/v/compiler_errors_test.v',
+		'vlib/v/doc/doc_test.v',
+		'vlib/v/fmt/fmt_test.v',
+		'vlib/v/fmt/fmt_keep_test.v',
+		'vlib/v/fmt/fmt_vlib_test.v',
+		'vlib/v/live/live_test.v',
+		'vlib/v/parser/v_parser_test.v',
+		'vlib/v/scanner/scanner_test.v',
+		'vlib/v/tests/inout/compiler_test.v',
+		'vlib/v/tests/prod_test.v',
+		'vlib/v/tests/profile/profile_test.v',
+		'vlib/v/tests/repl/repl_test.v',
+		'vlib/v/tests/valgrind/valgrind_test.v',
+	]
 	skip_with_fsanitize_memory    = [
 		'vlib/net/tcp_simple_client_server_test.v',
 		'vlib/net/http/cookie_test.v',
@@ -26,21 +43,6 @@ const (
 		'vlib/vweb/route_test.v',
 		'vlib/x/websocket/websocket_test.v',
 		'vlib/crypto/rand/crypto_rand_read_test.v',
-		// too slow:
-		'vlib/os/process_test.v',
-		'vlib/v/compiler_errors_test.v',
-		'vlib/v/doc/doc_test.v',
-		'vlib/v/fmt/fmt_test.v',
-		'vlib/v/fmt/fmt_keep_test.v',
-		'vlib/v/fmt/fmt_vlib_test.v',
-		'vlib/v/live/live_test.v',
-		'vlib/v/parser/v_parser_test.v',
-		'vlib/v/scanner/scanner_test.v',
-		'vlib/v/tests/inout/compiler_test.v',
-		'vlib/v/tests/prod_test.v',
-		'vlib/v/tests/profile/profile_test.v',
-		'vlib/v/tests/repl/repl_test.v',
-		'vlib/v/tests/valgrind/valgrind_test.v',
 	]
 	skip_with_fsanitize_address   = [
 		'vlib/x/websocket/websocket_test.v',
@@ -149,6 +151,10 @@ fn main() {
 			sanitize_undefined = true
 		}
 	}
+	if os.getenv('VTEST_RUN_FSANITIZE_TOO_SLOW').len == 0
+		&& (sanitize_undefined || sanitize_memory || sanitize_address) {
+		tsession.skip_files << skip_fsanitize_too_slow
+	}
 	if werror {
 		tsession.skip_files << skip_with_werror
 	}