diff --git a/DESCRIPTION b/DESCRIPTION
index ee7fbe2..fc01758 100755
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: pkgstats
 Title: Metrics of R Packages
-Version: 0.2.0.041
+Version: 0.2.0.046
 Authors@R: 
     person("Mark", "Padgham", , "mark.padgham@email.com", role = c("aut", "cre"),
            comment = c(ORCID = "0000-0003-2172-5265"))
diff --git a/R/cran-data-fn-names.R b/R/cran-data-fn-names.R
index 769b64b..8667e83 100644
--- a/R/cran-data-fn-names.R
+++ b/R/cran-data-fn-names.R
@@ -159,6 +159,8 @@ pkgstats_fns_from_archive <- function (path,
 #'
 #' @family archive
 #' @export
+
+# nocov start
 pkgstats_fns_update <- function (prev_results = NULL,
                                  results_file = NULL,
                                  chunk_size = 1000L,
@@ -253,3 +255,4 @@ pkgstats_fns_update <- function (prev_results = NULL,
 
     invisible (out)
 }
+# nocov end
diff --git a/R/cran-data-update.R b/R/cran-data-update.R
index 2db4f1b..2ffde9f 100644
--- a/R/cran-data-update.R
+++ b/R/cran-data-update.R
@@ -11,6 +11,8 @@ RELEASE_TAG <- "v0.1.6"
 #' @return Local path to directory containing updated results.
 #' @family archive
 #' @export
+
+# nocov start
 pkgstats_update <- function (upload = TRUE) {
 
     requireNamespace ("callr")
@@ -102,6 +104,7 @@ pkgstats_update <- function (upload = TRUE) {
         )
     }
 }
+# nocov end
 
 dl_prev_data <- function (results_path, what = "all") {
     what <- match.arg (what, c ("all", "current", "fn_names"))
diff --git a/codemeta.json b/codemeta.json
index c92f109..1c772d1 100644
--- a/codemeta.json
+++ b/codemeta.json
@@ -8,7 +8,7 @@
   "codeRepository": "https://github.com/ropensci-review-tools/pkgstats",
   "issueTracker": "https://github.com/ropensci-review-tools/pkgstats/issues",
   "license": "https://spdx.org/licenses/GPL-3.0",
-  "version": "0.2.0.041",
+  "version": "0.2.0.046",
   "programmingLanguage": {
     "@type": "ComputerLanguage",
     "name": "R",
diff --git a/tests/testthat/test-cran-update.R b/tests/testthat/test-cran-update.R
new file mode 100644
index 0000000..777fe84
--- /dev/null
+++ b/tests/testthat/test-cran-update.R
@@ -0,0 +1,115 @@
+test_all <- (identical (Sys.getenv ("MPADGE_LOCAL"), "true") |
+    identical (Sys.getenv ("GITHUB_WORKFLOW"), "test-coverage"))
+
+skip_if (!test_all)
+
+test_that ("cran data update functions", {
+
+    results_path <- fs::path (fs::path_temp (), "pkgstats-data")
+    fs::dir_create (results_path)
+
+    f <- dl_prev_data (results_path, what = "current")
+    expect_type (f, "character")
+    expect_length (f, 1L)
+    expect_true (fs::file_exists (f))
+
+    x <- readRDS (f)
+    expect_s3_class (x, "data.frame")
+    expect_equal (ncol (x), 95L)
+    expect_true (nrow (x) > 20000L)
+
+    expect_silent (
+        check_prev_results (x)
+    )
+
+    new <- list_new_cran_updates (x)
+    expect_type (new, "character")
+    if (length (new) > 0L) {
+        expect_true (all (grepl ("\\_[0-9]", new)))
+    }
+
+    fs::dir_delete (results_path)
+})
+
+test_that ("download tarball", {
+
+    pkg <- "odbc"
+    u <- paste0 ("https://cran.r-project.org/package=", pkg)
+    qry <- httr2::request (u)
+    resp <- httr2::req_perform (qry)
+    # No 'xml' or 'rvest' here, so process as raw text:
+    b <- httr2::resp_body_string (resp)
+    b <- strsplit (b, ",\\s") [[1]]
+    tarball <- grep ("\\.tar\\.gz", b, value = TRUE)
+    ptn <- "odbc\\_[0-9]\\.[0-9]\\.[0-9]\\.tar\\.gz"
+    tarball <- regmatches (tarball, regexpr (ptn, tarball))
+    tarball <- gsub ("\\.tar\\.gz$", "", tarball)
+
+    results_path <- fs::path (fs::path_temp (), "pkgstats-data")
+    fs::dir_create (results_path)
+
+    path <- dl_one_tarball (results_path, tarball)
+    expect_true (fs::file_exists (path))
+
+    fs::dir_delete (results_path)
+})
+
+# Some pkgs define an "exportPattern" in the namespace, and use that to define
+# exported functions. These call the separate `aliases_from_rd()` function,
+# which is covered in these tests. The selected package was identified using
+# the following code:
+#
+# flist <- fs::dir_ls (path_to_tarballs, regexp = "\\.tar\\.gz$")
+# dat <- pbapply::pblapply (flist, function (f) {
+#
+#     tb <- tryCatch (extract_tarball (f), error = function (e) NULL)
+#     ret <- NULL
+#     if (!is.null (tb)) {
+#         nmsp <- get_namespace_contents (tb)
+#         if (any (grepl ("exportPattern", nmsp))) {
+#             ret <- c (unname (f), as.character (file.size (f)))
+#         }
+#         fs::dir_delete (tb)
+#     }
+#
+#     return (ret)
+# })
+# dat <- do.call (rbind, dat)
+# rownames (dat) <- NULL
+# dat <- data.frame (pkg = basename (dat [, 1]), size = as.numeric (dat [, 2]))
+# dat <- dat [order (dat$size), ]
+#
+test_that ("fn_names_from_export_ptn", {
+
+    pkg <- "abodOutlier"
+    u <- paste0 ("https://cran.r-project.org/package=", pkg)
+    qry <- httr2::request (u)
+    resp <- httr2::req_perform (qry)
+    # No 'xml' or 'rvest' here, so process as raw text:
+    b <- httr2::resp_body_string (resp)
+    b <- strsplit (b, ",\\s") [[1]]
+    tarball <- grep ("\\.tar\\.gz", b, value = TRUE)
+    ptn <- "abodOutlier\\_[0-9]\\.[0-9]\\.tar\\.gz"
+    tarball <- regmatches (tarball, regexpr (ptn, tarball))
+    tarball <- gsub ("\\.tar\\.gz$", "", tarball)
+
+    results_path <- fs::path (fs::path_temp (), "pkgstats-data")
+    fs::dir_create (results_path)
+
+    path <- dl_one_tarball (results_path, tarball)
+    expect_true (fs::file_exists (path))
+
+    fn_nms <- pkgstats_fn_names (path)
+    expect_s3_class (fn_nms, "data.frame")
+    expect_equal (ncol (fn_nms), 3L)
+    expect_equal (names (fn_nms), c ("package", "version", "fn_name"))
+    expect_true (nrow (fn_nms) > 0L)
+
+    fs::dir_delete (results_path)
+
+    pkg <- fs::path (fs::path_temp (), gsub ("\\_.*$", "", tarball))
+    if (fs::dir_exists (pkg)) {
+        fs::dir_delete (pkg)
+    }
+
+})
diff --git a/tests/testthat/test-pkgstats.R b/tests/testthat/test-pkgstats.R
index 3ce9f1c..16756b1 100644
--- a/tests/testthat/test-pkgstats.R
+++ b/tests/testthat/test-pkgstats.R
@@ -95,3 +95,36 @@ test_that ("pkgstats", {
     expect_true ("stats" %in% ext$package)
     expect_true (length (unique (ext$package)) > 15L)
 })
+
+skip_if (!test_all)
+
+test_that ("pkgstats with tabs", {
+
+    if (!test_all) {
+        Sys.setenv ("PKGSTATS_CRAN_TESTS" = "true")
+    }
+
+    path <- system.file ("extdata", "pkgstats_9.9.tar.gz", package = "pkgstats")
+    path <- extract_tarball (path)
+    flist <- fs::dir_ls (fs::path (path, "R"), type = "file", recurse = TRUE)
+    f <- flist [which (basename (flist) == "loc.R")]
+    x <- readLines (f)
+    x <- gsub ("^\\s{12}", "\\\t\\\t\\\t", x)
+    x <- gsub ("^\\s{8}", "\\\t\\\t", x)
+    x <- gsub ("^\\s{4}", "\\\t", x)
+    writeLines (x, f)
+
+    # message is now produced once per session by readr, but can only be
+    # suppressed by Suggesting yet another package, `tidyselect`.
+    # expect_message (
+    s <- pkgstats (path)
+
+    if (!test_all) {
+        Sys.unsetenv ("PKGSTATS_CRAN_TESTS")
+    }
+
+    expect_s3_class (s$loc, "tbl_df")
+    expect_true (s$loc$ntabs [s$loc$dir == "R"] > 0L)
+
+    fs::dir_delete (path)
+})