diff --git a/.Rbuildignore b/.Rbuildignore
index a918770..6101f5b 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -1,3 +1,5 @@
 ^.*\.Rproj$
 ^\.Rproj\.user$
 ^Readme.md
+^NEWS.md
+^cran-comments.md
diff --git a/cran-comments.md b/cran-comments.md
new file mode 100644
index 0000000..9b1e49a
--- /dev/null
+++ b/cran-comments.md
@@ -0,0 +1,41 @@
+## Test environments
+* local Fedora 31 with R version 3.6.3
+* CentOS 7.7
+* win builder (release)
+* R-hub builder
+
+## local R CMD check results
+```
+── R CMD check results ───────────────────────────────── RKorAPClient 0.5.1 ────
+Duration: 1m 16.2s
+
+0 errors ✓ | 0 warnings ✓ | 0 notes ✓
+
+R CMD check succeeded
+```
+
+## R-hub builder
+### NOTE 1
+```
+Possibly mis-spelled words in DESCRIPTION:
+  KorAP (3:8)
+  KorAP's (7:42)
+  1. Redistributions of source code must retain the above copyright notice,
+File 'LICENSE':
+  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+```
+KorAP is the acronym of the project. It's spelled correctly. The rest, too.
+
+### NOTE 2
+```
+* checking examples ... NOTE
+Examples with CPU (user + system) or elapsed time > 5s
+                                   user system elapsed
+hc_freq_by_year_ci                 0.21   0.33    7.04
+KorAPQuery-class                   0.31   0.04    5.36
+corpusQuery-KorAPConnection-method 0.14   0.02    5.39
+ggplotly                           0.64   0.17   15.35
+** found \donttest examples: check also with --run-donttest
+```
+I have reduced the tests as much as possible with combinations of  `\dontshow` and `\donttest`.
+The rest is absolutely necessary and useful. The times vary a bit depending on the load of the server.