diff --git a/autoload/ale/lsp/response.vim b/autoload/ale/lsp/response.vim
index 4b895ac7..69e88d56 100644
--- a/autoload/ale/lsp/response.vim
+++ b/autoload/ale/lsp/response.vim
@@ -59,10 +59,11 @@ function! ale#lsp#response#ReadDiagnostics(response) abort
             let l:related = deepcopy(l:diagnostic.relatedInformation)
             call map(l:related, {key, val ->
                 \ ale#path#FromURI(val.location.uri) .
-                \ ':' . val.location.range.start.line . ':' . val.location.range.start.character .
+                \ ':' . (val.location.range.start.line + 1) .
+                \ ':' . (val.location.range.start.character + 1) .
                 \ ":\n\t" . val.message
                 \ })
-            let l:loclist_item.detail = l:diagnostic.message . "\n" . join(l:related, "\n") . "\n"
+            let l:loclist_item.detail = l:diagnostic.message . "\n" . join(l:related, "\n")
         endif
 
         call add(l:loclist, l:loclist_item)
diff --git a/test/lsp/test_read_lsp_diagnostics.vader b/test/lsp/test_read_lsp_diagnostics.vader
index d795ae29..be50fbe8 100644
--- a/test/lsp/test_read_lsp_diagnostics.vader
+++ b/test/lsp/test_read_lsp_diagnostics.vader
@@ -149,7 +149,7 @@ Execute(ale#lsp#response#ReadDiagnostics() should use relatedInformation for det
   \     'col': 3,
   \     'end_lnum': 1,
   \     'end_col': 3,
-  \     'detail': "Something went wrong!\n/tmp/someotherfile.txt:42:79:\n\tmight be this"
+  \     'detail': "Something went wrong!\n/tmp/someotherfile.txt:43:80:\n\tmight be this"
   \   }
   \ ],
   \ ale#lsp#response#ReadDiagnostics({'params': {'uri': 'filename.ts', 'diagnostics': [
@@ -162,7 +162,7 @@ Execute(ale#lsp#response#ReadDiagnostics() should use relatedInformation for det
   \             'uri': 'file:///tmp/someotherfile.txt',
   \             'range': {
   \                 'start': { 'line': 42, 'character': 79 },
-  \                 'end': { 'line': 43, 'character': 80 },
+  \                 'end': { 'line': 142, 'character': 179},
   \             }
   \         }
   \     }]