diff --git a/.cirrus.yml b/.cirrus.yml
index feff5c6c7a..06c3b919ce 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -58,8 +58,6 @@ task:
   << : *CREDITS_TEMPLATE
   setup_script:
     - set -o errexit; source ./ci/test/00_setup_env.sh
-  before_install_script:
-    - set -o errexit; source ./ci/test/03_before_install.sh
   install_script:
     - set -o errexit; source ./ci/lint/04_install.sh
   before_script:
diff --git a/README.md b/README.md
index 6f93668c5a..35b5f1b784 100644
--- a/README.md
+++ b/README.md
@@ -62,7 +62,8 @@ There are also [regression and integration tests](/test), written
 in Python.
 These tests can be run (if the [test dependencies](/test) are installed) with: `test/functional/test_runner.py`
 
-The Travis CI system makes sure that every pull request is built for Windows, Linux, and macOS, and that unit/sanity tests are run automatically.
+The CI (Continuous Integration) systems make sure that every pull request is built for Windows, Linux, and macOS,
+and that unit/sanity tests are run automatically.
 
 ### Manual Quality Assurance (QA) Testing
 
diff --git a/ci/test/03_before_install.sh b/ci/test/03_before_install.sh
deleted file mode 100755
index 80806aab75..0000000000
--- a/ci/test/03_before_install.sh
+++ /dev/null
@@ -1,22 +0,0 @@
-#!/usr/bin/env bash
-#
-# Copyright (c) 2018-2019 The Bitcoin Core developers
-# Distributed under the MIT software license, see the accompanying
-# file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-export LC_ALL=C.UTF-8
-
-BEGIN_FOLD () {
-  echo ""
-  CURRENT_FOLD_NAME=$1
-  echo "travis_fold:start:${CURRENT_FOLD_NAME}"
-}
-
-END_FOLD () {
-  RET=$?
-  echo "travis_fold:end:${CURRENT_FOLD_NAME}"
-  if [ $RET != 0 ]; then
-    echo "${CURRENT_FOLD_NAME} failed with status code ${RET}"
-  fi
-}
-
diff --git a/ci/test/05_before_script.sh b/ci/test/05_before_script.sh
index 5875a0ec9f..d93e8eae37 100755
--- a/ci/test/05_before_script.sh
+++ b/ci/test/05_before_script.sh
@@ -36,7 +36,5 @@ if [ -z "$NO_DEPENDS" ]; then
   DOCKER_EXEC $SHELL_OPTS make $MAKEJOBS -C depends HOST=$HOST $DEP_OPTS
 fi
 if [ -n "$PREVIOUS_RELEASES_TO_DOWNLOAD" ]; then
-  BEGIN_FOLD previous-versions
   DOCKER_EXEC test/get_previous_releases.py -b -t "$PREVIOUS_RELEASES_DIR" "${PREVIOUS_RELEASES_TO_DOWNLOAD}"
-  END_FOLD
 fi
diff --git a/ci/test_run_all.sh b/ci/test_run_all.sh
index e082342d0a..9e5d9ac6ec 100755
--- a/ci/test_run_all.sh
+++ b/ci/test_run_all.sh
@@ -7,6 +7,5 @@
 export LC_ALL=C.UTF-8
 
 set -o errexit; source ./ci/test/00_setup_env.sh
-set -o errexit; source ./ci/test/03_before_install.sh
 set -o errexit; source ./ci/test/04_install.sh
 set -o errexit; source ./ci/test/05_before_script.sh
diff --git a/doc/developer-notes.md b/doc/developer-notes.md
index 9096bf352a..6d38831811 100644
--- a/doc/developer-notes.md
+++ b/doc/developer-notes.md
@@ -621,7 +621,7 @@ General Dash Core
   - *Rationale*: RPC allows for better automatic testing. The test suite for
     the GUI is very limited.
 
-- Make sure pull requests pass Travis CI before merging.
+- Make sure pull requests pass CI before merging.
 
   - *Rationale*: Makes sure that they pass thorough testing, and that the tester will keep passing
      on the master branch. Otherwise, all new pull requests will start failing the tests, resulting in
@@ -1068,7 +1068,7 @@ Scripted diffs
 --------------
 
 For reformatting and refactoring commits where the changes can be easily automated using a bash script, we use
-scripted-diff commits. The bash script is included in the commit message and our Travis CI job checks that
+scripted-diff commits. The bash script is included in the commit message and our CI job checks that
 the result of the script is identical to the commit. This aids reviewers since they can verify that the script
 does exactly what it is supposed to do. It is also helpful for rebasing (since the same script can just be re-run
 on the new master commit).
diff --git a/test/functional/README.md b/test/functional/README.md
index ca3e92a54d..be46730f9d 100644
--- a/test/functional/README.md
+++ b/test/functional/README.md
@@ -23,7 +23,7 @@ don't have test cases for.
 - The oldest supported Python version is specified in [doc/dependencies.md](/doc/dependencies.md).
   Consider using [pyenv](https://github.com/pyenv/pyenv), which checks [.python-version](/.python-version),
   to prevent accidentally introducing modern syntax from an unsupported Python version.
-  The Travis linter also checks this, but [possibly not in all cases](https://github.com/bitcoin/bitcoin/pull/14884#discussion_r239585126).
+  The CI linter job also checks this, but [possibly not in all cases](https://github.com/bitcoin/bitcoin/pull/14884#discussion_r239585126).
 - See [the python lint script](/test/lint/lint-python.sh) that checks for violations that
   could lead to bugs and issues in the test code.
 - Use [type hints](https://docs.python.org/3/library/typing.html) in your code to improve code readability