diff --git a/autoload/go/coverage.vim b/autoload/go/coverage.vim
index 6f3bdc52cf..31bafadbf8 100644
--- a/autoload/go/coverage.vim
+++ b/autoload/go/coverage.vim
@@ -224,7 +224,7 @@ function! go#coverage#overlay(file) abort
     let cnt += 1
   endwhile
 
-  let fname = expand('%:t')
+  let fname = expand('%')
 
   " when called for a _test.go file, run the coverage for the actuall file
   " file
@@ -241,6 +241,9 @@ function! go#coverage#overlay(file) abort
     exe ":edit ". fnamemodify(fname, ":p")
   endif
 
+  " cov.file includes only the filename itself, without full path
+  let fname = fnamemodify(fname, ":t")
+
   for line in lines[1:]
     let cov = go#coverage#parsegocoverline(line)