diff --git a/test/smoketests/spectests/CMakeLists.txt b/test/smoketests/spectests/CMakeLists.txt
index 0142b1a6d..2076e8644 100644
--- a/test/smoketests/spectests/CMakeLists.txt
+++ b/test/smoketests/spectests/CMakeLists.txt
@@ -72,6 +72,16 @@ set_tests_properties(
     PASS_REGULAR_EXPRESSION "PASSED 4, FAILED 22, SKIPPED 2"
 )
 
+add_test(
+        NAME fizzy/smoketests/spectests/failures-output
+        COMMAND fizzy-spectests ${CMAKE_CURRENT_LIST_DIR}/failures
+)
+set_tests_properties(
+        fizzy/smoketests/spectests/failures-output
+        PROPERTIES
+        PASS_REGULAR_EXPRESSION "FAILED Incorrect returned value\\. Expected: 12 \\(0xc\\) Actual: 10 \\(0xa\\)"
+)
+
 add_test(
     NAME fizzy/smoketests/spectests/broken
     COMMAND fizzy-spectests ${CMAKE_CURRENT_LIST_DIR}/broken
diff --git a/test/smoketests/spectests/failures/failures.14.wasm b/test/smoketests/spectests/failures/failures.14.wasm
index d0bae3919..6091d98b2 100644
Binary files a/test/smoketests/spectests/failures/failures.14.wasm and b/test/smoketests/spectests/failures/failures.14.wasm differ
diff --git a/test/smoketests/spectests/failures/failures.json b/test/smoketests/spectests/failures/failures.json
index 16f8271dc..7f5697271 100644
--- a/test/smoketests/spectests/failures/failures.json
+++ b/test/smoketests/spectests/failures/failures.json
@@ -19,7 +19,7 @@
   {"type": "assert_unlinkable", "line": 38, "filename": "failures.13.wasm", "text": "error", "module_type": "binary"}, 
   {"type": "module", "line": 41, "filename": "failures.14.wasm"}, 
   {"type": "assert_return", "line": 48, "action": {"type": "invoke", "field": "foo.i32", "args": []}, "expected": [{"type": "i32", "value": "2"}]}, 
-  {"type": "assert_return", "line": 49, "action": {"type": "invoke", "field": "foo.i64", "args": []}, "expected": [{"type": "i64", "value": "2"}]}, 
+  {"type": "assert_return", "line": 49, "action": {"type": "invoke", "field": "foo.i64", "args": []}, "expected": [{"type": "i64", "value": "12"}]}, 
   {"type": "assert_return", "line": 50, "action": {"type": "invoke", "field": "foo.f32", "args": []}, "expected": [{"type": "f32", "value": "1075654427"}]}, 
   {"type": "assert_return", "line": 51, "action": {"type": "invoke", "field": "foo.f64", "args": []}, "expected": [{"type": "f64", "value": "4612712839142428377"}]}, 
   {"type": "assert_return", "line": 52, "action": {"type": "invoke", "field": "foo.f32", "args": []}, "expected": [{"type": "f32", "value": "nan:canonical"}]}, 
diff --git a/test/smoketests/spectests/failures/failures.wast b/test/smoketests/spectests/failures/failures.wast
index d250297bd..ced385eaf 100644
--- a/test/smoketests/spectests/failures/failures.wast
+++ b/test/smoketests/spectests/failures/failures.wast
@@ -40,13 +40,13 @@
 ;; invalid result
 (module
     (func (export "foo.i32") (result i32) (i32.const 1))
-    (func (export "foo.i64") (result i64) (i64.const 1))
+    (func (export "foo.i64") (result i64) (i64.const 10))
     (func (export "foo.f32") (result f32) (f32.const 1.234))
     (func (export "foo.f64") (result f64) (f64.const 1.234))
     (func (export "trap") (result i32) (unreachable))
 )
 (assert_return (invoke "foo.i32") (i32.const 2))
-(assert_return (invoke "foo.i64") (i64.const 2))
+(assert_return (invoke "foo.i64") (i64.const 12))
 (assert_return (invoke "foo.f32") (f32.const 2.456))
 (assert_return (invoke "foo.f64") (f64.const 2.456))
 (assert_return (invoke "foo.f32") (f32.const nan:canonical))
diff --git a/test/spectests/spectests.cpp b/test/spectests/spectests.cpp
index 378d85095..f1e14bd24 100644
--- a/test/spectests/spectests.cpp
+++ b/test/spectests/spectests.cpp
@@ -492,8 +492,8 @@ class test_runner
             std::stringstream message;
             message << "Incorrect returned value. Expected: " << expected_value.i64 << " (0x"
                     << std::hex << expected_value.i64 << ")"
-                    << " Actual: " << actual_value.i64 << " (0x" << std::hex << actual_value.i64
-                    << ")";
+                    << " Actual: " << std::dec << actual_value.i64 << " (0x" << std::hex
+                    << actual_value.i64 << ")";
             fail(message.str());
             return false;
         }