diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index cd73f2a..57233c5 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -27,3 +27,13 @@ jobs:
         uses: actions/checkout@v3
       - name: Check YAML formatting.
         run: earthly --ci +check-yaml-formatting
+  e2e-test:
+    name: End to end tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Earthly v0.8.1.
+        run: "sudo /bin/sh -c 'wget https://github.com/earthly/earthly/releases/download/v0.8.1/earthly-linux-amd64 -O /usr/local/bin/earthly && chmod +x /usr/local/bin/earthly'"
+      - name: Checkout code.
+        uses: actions/checkout@v3
+      - name: Check YAML formatting.
+        run: earthly --ci +e2e-test
diff --git a/Earthfile b/Earthfile
index 8bb7d95..1733a77 100644
--- a/Earthfile
+++ b/Earthfile
@@ -90,3 +90,40 @@ check-github-actions-workflows-linting:
     RUN go install github.com/rhysd/actionlint/cmd/actionlint@v1.6.26
     DO +COPY_CI_DATA
     RUN ./ci/check-github-actions-workflows-linting.sh
+
+
+COPY_SOURCECODE:
+    COMMAND
+	COPY "./zsh-simple-abbreviations.zsh" "./zsh-simple-abbreviations.zsh"
+    COPY "./src" "./src"
+    COPY "./end-to-end-tests" "./end-to-end-tests"
+
+
+e2e-test:
+    BUILD +setting-abbreviation-e2e-test
+    BUILD +unsetting-abbreviation-e2e-test
+    BUILD +no-space-does-not-expand-abbreviation-e2e-test
+
+
+e2e-test-base:
+    FROM python:3.9.18
+    DO +COPY_SOURCECODE
+    # https://askubuntu.com/questions/462690/what-does-apt-get-fix-missing-do-and-when-is-it-useful
+    RUN apt-get update --fix-missing
+    RUN apt-get install zsh -y
+    RUN pip3 install -r end-to-end-tests/requirements.txt
+
+
+setting-abbreviation-e2e-test:
+    FROM +e2e-test-base
+    RUN python3 end-to-end-tests/setting-abbreviation.py
+
+
+unsetting-abbreviation-e2e-test:
+    FROM +e2e-test-base
+    RUN python3 end-to-end-tests/unsetting-abbreviation.py
+
+
+no-space-does-not-expand-abbreviation-e2e-test:
+    FROM +e2e-test-base
+    RUN python3 end-to-end-tests/no-space-does-not-expand-abbreviation.py
diff --git a/end-to-end-tests/no-space-does-not-expand-abbreviation.py b/end-to-end-tests/no-space-does-not-expand-abbreviation.py
new file mode 100644
index 0000000..ea587ac
--- /dev/null
+++ b/end-to-end-tests/no-space-does-not-expand-abbreviation.py
@@ -0,0 +1,31 @@
+import pexpect
+import os
+
+
+full_path = os.path.realpath(__file__)
+test_directory = os.path.dirname(full_path)
+
+zsh = pexpect.spawnu('/usr/bin/env zsh --no-rcs',
+                     env=os.environ | {'PROMPT': '>'})
+
+# Ready to take a command.
+zsh.expect('>')
+# Source the plugin and add an abbreviation.
+zsh.sendline(
+    f"source \"{test_directory}/../zsh-simple-abbreviations.zsh\" && zsh-simple-abbreviations --set H 'hello'")
+
+# Ready to take a command.
+zsh.expect('>')
+before = zsh.after
+# Use the abbreviation.
+zsh.sendline("echo H")
+
+# Ready to take a command.
+zsh.expect('>')
+output = (before + zsh.before)
+
+# Assert the abbreviation was expanded to 'hello'.
+assert "hello" not in output
+
+# Done with test close Zsh.
+zsh.close()
diff --git a/end-to-end-tests/requirements.txt b/end-to-end-tests/requirements.txt
new file mode 100644
index 0000000..0cb0017
--- /dev/null
+++ b/end-to-end-tests/requirements.txt
@@ -0,0 +1,2 @@
+pexpect==4.9.0
+ptyprocess==0.7.0
diff --git a/end-to-end-tests/setting-abbreviation.py b/end-to-end-tests/setting-abbreviation.py
new file mode 100644
index 0000000..99ededb
--- /dev/null
+++ b/end-to-end-tests/setting-abbreviation.py
@@ -0,0 +1,31 @@
+import pexpect
+import os
+
+
+full_path = os.path.realpath(__file__)
+test_directory = os.path.dirname(full_path)
+
+zsh = pexpect.spawnu('/usr/bin/env zsh --no-rcs',
+                     env=os.environ | {'PROMPT': '>'})
+
+# Ready to take a command.
+zsh.expect('>')
+# Source the plugin and add an abbreviation.
+zsh.sendline(
+    f"source \"{test_directory}/../zsh-simple-abbreviations.zsh\" && zsh-simple-abbreviations --set H 'hello'")
+
+# Ready to take a command.
+zsh.expect('>')
+before = zsh.after
+# Use the abbreviation.
+zsh.sendline("echo H ")
+
+# Ready to take a command.
+zsh.expect('>')
+output = (before + zsh.before)
+
+# Assert the abbreviation was expanded to 'hello'.
+assert "hello" in output
+
+# Done with test close Zsh.
+zsh.close()
diff --git a/end-to-end-tests/unsetting-abbreviation.py b/end-to-end-tests/unsetting-abbreviation.py
new file mode 100644
index 0000000..67a462d
--- /dev/null
+++ b/end-to-end-tests/unsetting-abbreviation.py
@@ -0,0 +1,44 @@
+import pexpect
+import os
+
+
+full_path = os.path.realpath(__file__)
+test_directory = os.path.dirname(full_path)
+
+zsh = pexpect.spawnu('/usr/bin/env zsh --no-rcs',
+                     env=os.environ | {'PROMPT': '>'})
+
+# Ready to take a command.
+zsh.expect('>')
+# Source the plugin and set an abbreviation.
+zsh.sendline(
+    f"source \"{test_directory}/../zsh-simple-abbreviations.zsh\" && zsh-simple-abbreviations --set H 'hello'")
+
+# Ready to take a command.
+zsh.expect('>')
+before = zsh.after
+# Use the abbreviation.
+zsh.sendline("echo H ")
+
+# Ready to take a command.
+zsh.expect('>')
+output = (before + zsh.before)
+# Assert the abbreviation was expanded to 'hello'.
+assert "hello" in output
+# Unset the abbreviation.
+zsh.sendline("zsh-simple-abbreviations --unset H")
+
+# Ready to take a command.
+zsh.expect('>')
+before = zsh.after
+# Use the abbreviation.
+zsh.sendline("echo H ")
+
+# Ready to take a command.
+zsh.expect('>')
+output = (before + zsh.before)
+# Assert abbreviation was unset.
+assert "hello" not in output
+
+# Done with test close Zsh.
+zsh.close()