diff --git a/.builds/openbsd.yml b/.builds/openbsd.yml
index 27b165de72..1ac830e6ad 100644
--- a/.builds/openbsd.yml
+++ b/.builds/openbsd.yml
@@ -31,3 +31,8 @@ tasks:
     cmake -G Ninja ..
     cmake --build . --config Debug
     ./bin/nvim --version
+- test: |
+    export LC_CTYPE=en_US.UTF-8
+    cd neovim
+    # oldtests
+    gmake -C src/nvim/testdir NVIM_PRG=`pwd`/build/bin/nvim
diff --git a/src/nvim/testdir/test_functions.vim b/src/nvim/testdir/test_functions.vim
index fab1d7790d..b03abb5b34 100644
--- a/src/nvim/testdir/test_functions.vim
+++ b/src/nvim/testdir/test_functions.vim
@@ -1170,6 +1170,8 @@ func Test_libcall_libcallnr()
     else
       let libc = '/usr/lib/libc.so'
     endif
+  elseif system('uname -s') =~ 'OpenBSD'
+    let libc = 'libc.so'
   else
     " On Unix, libc.so can be in various places.
     " Interestingly, using an empty string for the 1st argument of libcall