diff --git a/R/Require-helpers.R b/R/Require-helpers.R
index 910c4232..3f96ca3e 100644
--- a/R/Require-helpers.R
+++ b/R/Require-helpers.R
@@ -451,7 +451,7 @@ available.packagesCached <- function(repos, purge, verbose = getOption("Require.
     types <- type
   }
 
-  missingHttp <- !startsWith(unlist(repos), "http")
+  missingHttp <- !grepl("^[a-z]+://", unlist(repos))  # only bare domain names, not file:// or other protocols
   if (any(missingHttp)) {
     repos[missingHttp] <- lapply(repos[missingHttp], function(r) {
       paste0("https://", r)
diff --git a/tests/testthat/test-16parentChain_integration_testthat.R b/tests/testthat/test-16parentChain_integration_testthat.R
new file mode 100644
index 00000000..f50c8bb8
--- /dev/null
+++ b/tests/testthat/test-16parentChain_integration_testthat.R
@@ -0,0 +1,73 @@
+test_that("parentChain shows in 'not on CRAN' message for deps of a local package", {
+  # Integration test for the parentChain feature.
+  #
+  # We mock joinToAvailablePackages so it returns dummypkgwithpryr as a current-CRAN
+  # package (VersionOnRepos = "1.0", Imports = "pryr").  This avoids any file:// or
+  # network-reliability issues while still exercising the full recursive code path:
+  #   getPkgDeps -> getDeps -> getDepsNonGH -> pkgDepCRAN -> (recurse for pryr)
+  #        -> pkgDepCRAN("pryr", parentChain="dummypkgwithpryr")
+  #        -> "pryr (required by: dummypkgwithpryr) not on CRAN; checking CRAN archives"
+  #
+  # pryr is a real archived-CRAN package, so the final "not on CRAN" check is live.
+
+  skip_if_offline2()
+  setupInitial <- setupTest()
+
+  pkgname <- "dummypkgwithpryr"
+  repos   <- "https://cloud.r-project.org"
+
+  # Mock joinToAvailablePackages: for dummypkgwithpryr, inject VersionOnRepos + Imports
+  # so pkgDepCRAN treats it as a current-CRAN package whose DESCRIPTION we already have.
+  # For all other packages (e.g. pryr), call the real function.
+  real_join <- Require:::joinToAvailablePackages
+  testthat::local_mocked_bindings(
+    joinToAvailablePackages = function(pkgDT, repos, type, which, verbose) {
+      out <- real_join(pkgDT, repos, type, which, verbose)
+      isDummy <- out$Package %in% pkgname
+      if (any(isDummy)) {
+        data.table::set(out, which(isDummy), "VersionOnRepos", "1.0")
+        data.table::set(out, which(isDummy), "Repository",
+                        "https://cloud.r-project.org")
+        # Inject Imports so assignPkgDTtoSaveNames discovers pryr as a dep
+        for (col in which) {
+          if (is.null(out[[col]]))
+            data.table::set(out, NULL, col, NA_character_)
+        }
+        data.table::set(out, which(isDummy), "Imports", "pryr")
+      }
+      out
+    },
+    .package = "Require"
+  )
+
+  msgs <- character(0)
+  withCallingHandlers(
+    tryCatch(
+      pkgDep(pkgname,
+             repos     = repos,
+             verbose   = 1,
+             recursive = TRUE,
+             purge     = TRUE),
+      error = function(e) NULL
+    ),
+    message = function(m) {
+      msgs <<- c(msgs, conditionMessage(m))
+      invokeRestart("muffleMessage")
+    }
+  )
+
+  # Word-boundary grep so "dummypkgwithpryr" (which contains "pryr") is not matched
+  not_on_cran_msgs <- msgs[grepl("not on CRAN", msgs, fixed = TRUE)]
+  pryr_not_on_cran <- not_on_cran_msgs[grepl("\\bpryr\\b", not_on_cran_msgs)]
+
+  testthat::expect_true(
+    length(pryr_not_on_cran) > 0,
+    info = paste("Expected a 'pryr ... not on CRAN' message. Messages captured:\n",
+                 paste(msgs, collapse = "\n"))
+  )
+  testthat::expect_true(
+    any(grepl(paste0("required by: ", pkgname), pryr_not_on_cran, fixed = TRUE)),
+    info = paste0("Expected '(required by: ", pkgname, ")' in the pryr 'not on CRAN' ",
+                  "message. Got:\n", paste(pryr_not_on_cran, collapse = "\n"))
+  )
+})