diff --git a/core/tests/backend/inline_tests.rs b/core/tests/backend/inline_tests.rs
index 1e189ccf..01444a43 100644
--- a/core/tests/backend/inline_tests.rs
+++ b/core/tests/backend/inline_tests.rs
@@ -16,7 +16,7 @@ fn test_render_html_valid_escaped_inline() {
     let mut expected_html = format!("<p id='{}'>\\*23\\*3</p>", id);
 
     let result = block.render_html();
-    assert!(result.is_ok(), "Cause: {}", result.unwrap_err());
+    assert!(result.is_ok(), "Cause: {:?}", result.unwrap_err());
     assert_eq!(
         expected_html,
         result.unwrap(),
@@ -26,7 +26,7 @@ fn test_render_html_valid_escaped_inline() {
     block.content = "\\ *italic*\\".to_string();
     expected_html = format!("<p id='{}'>\\ <i>italic</i>\\</p>", id);
     let result = block.render_html();
-    assert!(result.is_ok(), "Cause: {}", result.unwrap_err());
+    assert!(result.is_ok(), "Cause: {:?}", result.unwrap_err());
     assert_eq!(
         expected_html,
         result.unwrap(),
@@ -37,7 +37,7 @@ fn test_render_html_valid_escaped_inline() {
     expected_html = format!("<p id='{}'><b>\\*only bold\\*</b></p>", id);
 
     let result = block.render_html();
-    assert!(result.is_ok(), "Cause: {}", result.unwrap_err());
+    assert!(result.is_ok(), "Cause: {:?}", result.unwrap_err());
     assert_eq!(
         expected_html,
         result.unwrap(),
diff --git a/core/tests/elements/metadata.rs b/core/tests/elements/metadata.rs
index 4d646f7f..7c514263 100644
--- a/core/tests/elements/metadata.rs
+++ b/core/tests/elements/metadata.rs
@@ -35,12 +35,13 @@ fn test_ir_root_metadata_in_ir() {
 
     assert!(
         transaction.is_ok(),
-        "Cause: {:?}",
-        UmError::Ir(IrError {
-            tablename: "metadata".to_string(),
-            column: "-".to_string(),
-            message: "given metadata not found".to_string(),
-        })
+        //TODO: How to throw error?
+        // "Cause: {:?}",
+        // UmError::Ir(IrError {
+        //     tablename: "metadata".to_string(),
+        //     column: "-".to_string(),
+        //     message: "given metadata not found".to_string(),
+        // })
     );
 
     let metadata_exists = middleend::entry_already_exists(&ir_metadata, &transaction.unwrap());