diff --git a/tests/testthat/test-fit-mle.R b/tests/testthat/test-fit-mle.R
index 40fddc2b..f5828a60 100644
--- a/tests/testthat/test-fit-mle.R
+++ b/tests/testthat/test-fit-mle.R
@@ -53,7 +53,7 @@ test_that("time is reported after optimization", {
 
 test_that("no error when checking estimates after failure", {
   fit <- cmdstanr_example("schools", method = "optimize", seed = 123) # optim ålways fails for this
-  expect_silent(fit$summary()) # no error
+  expect_silent(fit$summary(include_failed = TRUE)) # no error
 })
 
 test_that("draws() works for different formats", {
diff --git a/tests/testthat/test-model-compile.R b/tests/testthat/test-model-compile.R
index 3134bbc0..8fae1a02 100644
--- a/tests/testthat/test-model-compile.R
+++ b/tests/testthat/test-model-compile.R
@@ -424,14 +424,14 @@ test_that("check_syntax() works with pedantic=TRUE", {
   "
   stan_file <- write_stan_file(model_code)
   mod_dep_warning <- cmdstan_model(stan_file, compile = FALSE)
-  expect_message(
+  expect_error(
     mod_dep_warning$compile(),
-    "deprecated in the Stan language",
+    "An error occured during compilation! See the message above for more information.",
     fixed = TRUE
   )
-  expect_message(
+  expect_error(
     mod_dep_warning$check_syntax(),
-    "deprecated in the Stan language",
+    "Syntax error found! See the message above for more information.",
     fixed = TRUE
   )
 })
@@ -690,13 +690,9 @@ test_that("format() works", {
   stan_file_tmp <- write_stan_file(code)
   mod_1 <- cmdstan_model(stan_file_tmp, compile = FALSE)
 
-  expect_output(
-    expect_message(
-      mod_1$format(),
-      "is deprecated",
-      fixed = TRUE
-    ),
-    "target += normal_log(y, 0, 1);",
+  expect_error(
+    mod_1$format(),
+    "Syntax error found! See the message above for more information.",
     fixed = TRUE
   )