diff --git a/Makefile b/Makefile
index 13dc913..d1d17e7 100644
--- a/Makefile
+++ b/Makefile
@@ -17,29 +17,17 @@ build:
 test:
 	TESTER_DIR=$(shell pwd) go test -count=1 -p 1 -v ./internal/...
 
-test_base_w_bash: build
-	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/bash \
-	CODECRAFTERS_TEST_CASES_JSON="[ \
-		{\"slug\":\"oo8\",\"tester_log_prefix\":\"tester::#oo8\",\"title\":\"Stage #1: Init\"}, \
-		{\"slug\":\"cz2\",\"tester_log_prefix\":\"tester::#cz2\",\"title\":\"Stage #2: Invalid Command\"}, \
-		{\"slug\":\"ff0\",\"tester_log_prefix\":\"tester::#ff0\",\"title\":\"Stage #3: REPL\"}, \
-		{\"slug\":\"pn5\",\"tester_log_prefix\":\"tester::#pn5\",\"title\":\"Stage #4: Exit\"}, \
-		{\"slug\":\"iz3\",\"tester_log_prefix\":\"tester::#iz3\",\"title\":\"Stage #5: Echo\"}, \
-		{\"slug\":\"ez5\",\"tester_log_prefix\":\"tester::#ez5\",\"title\":\"Stage #6: Type built-in\"}, \
-		{\"slug\":\"mg5\",\"tester_log_prefix\":\"tester::#mg5\",\"title\":\"Stage #7: Type for executables\"}, \
-		{\"slug\":\"ip1\",\"tester_log_prefix\":\"tester::#ip1\",\"title\":\"Stage #8: Run a program\"} \
-	]" \
-	dist/main.out
+record_fixtures:
+	CODECRAFTERS_RECORD_FIXTURES=true make test
 
-test_nav_w_bash: build
-	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/bash \
-	CODECRAFTERS_TEST_CASES_JSON="[ \
-		{\"slug\":\"ei0\",\"tester_log_prefix\":\"tester::#ei0\",\"title\":\"Stage #9: PWD\"}, \
-		{\"slug\":\"ra6\",\"tester_log_prefix\":\"tester::#ra6\",\"title\":\"Stage #10: CD-1\"}, \
-		{\"slug\":\"gq9\",\"tester_log_prefix\":\"tester::#gq9\",\"title\":\"Stage #11: CD-2\"}, \
-		{\"slug\":\"gp4\",\"tester_log_prefix\":\"tester::#gp4\",\"title\":\"Stage #12: CD-3\"} \
-	]" \
-	dist/main.out
+update_tester_utils:
+	go get -u github.com/codecrafters-io/tester-utils
+
+copy_course_file:
+	gh api repos/codecrafters-io/build-your-own-shell/contents/course-definition.yml \
+		| jq -r .content \
+		| base64 -d \
+		> internal/test_helpers/course_definition.yml
 
 test_dash: build
 	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/dash \
@@ -59,20 +47,6 @@ test_dash: build
 	]" \
 	dist/main.out
 
-test_ryan: build
-	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/ryan_shell \
-	CODECRAFTERS_TEST_CASES_JSON="[ \
-		{\"slug\":\"cz2\",\"tester_log_prefix\":\"tester::#cz2\",\"title\":\"Stage #2: Invalid Command\"}, \
-		{\"slug\":\"ff0\",\"tester_log_prefix\":\"tester::#ff0\",\"title\":\"Stage #3: REPL\"}, \
-		{\"slug\":\"iz3\",\"tester_log_prefix\":\"tester::#iz3\",\"title\":\"Stage #5: Echo\"}, \
-		{\"slug\":\"ez5\",\"tester_log_prefix\":\"tester::#ez5\",\"title\":\"Stage #6: Type built-in\"}, \
-		{\"slug\":\"mg5\",\"tester_log_prefix\":\"tester::#mg5\",\"title\":\"Stage #7: Type for executables\"}, \
-		{\"slug\":\"ip1\",\"tester_log_prefix\":\"tester::#ip1\",\"title\":\"Stage #8: Run a program\"} \
-	]" \
-	dist/main.out
-
-test_all_success: test_bash test_dash
-
 test_failure: build
 	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/failure \
 	CODECRAFTERS_TEST_CASES_JSON="[ \
@@ -94,18 +68,29 @@ test_zsh_dangerously: build
 	]" \
 	dist/main.out
 
+test_base_w_bash: build
+	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/bash \
+	CODECRAFTERS_TEST_CASES_JSON="[ \
+		{\"slug\":\"oo8\",\"tester_log_prefix\":\"tester::#oo8\",\"title\":\"Stage #1: Init\"}, \
+		{\"slug\":\"cz2\",\"tester_log_prefix\":\"tester::#cz2\",\"title\":\"Stage #2: Invalid Command\"}, \
+		{\"slug\":\"ff0\",\"tester_log_prefix\":\"tester::#ff0\",\"title\":\"Stage #3: REPL\"}, \
+		{\"slug\":\"pn5\",\"tester_log_prefix\":\"tester::#pn5\",\"title\":\"Stage #4: Exit\"}, \
+		{\"slug\":\"iz3\",\"tester_log_prefix\":\"tester::#iz3\",\"title\":\"Stage #5: Echo\"}, \
+		{\"slug\":\"ez5\",\"tester_log_prefix\":\"tester::#ez5\",\"title\":\"Stage #6: Type built-in\"}, \
+		{\"slug\":\"mg5\",\"tester_log_prefix\":\"tester::#mg5\",\"title\":\"Stage #7: Type for executables\"}, \
+		{\"slug\":\"ip1\",\"tester_log_prefix\":\"tester::#ip1\",\"title\":\"Stage #8: Run a program\"} \
+	]" \
+	dist/main.out
 
-record_fixtures:
-	CODECRAFTERS_RECORD_FIXTURES=true make test
-
-update_tester_utils:
-	go get -u github.com/codecrafters-io/tester-utils
-
-copy_course_file:
-	gh api repos/codecrafters-io/build-your-own-shell/contents/course-definition.yml \
-		| jq -r .content \
-		| base64 -d \
-		> internal/test_helpers/course_definition.yml
+test_nav_w_bash: build
+	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/bash \
+	CODECRAFTERS_TEST_CASES_JSON="[ \
+		{\"slug\":\"ei0\",\"tester_log_prefix\":\"tester::#ei0\",\"title\":\"Stage #9: PWD\"}, \
+		{\"slug\":\"ra6\",\"tester_log_prefix\":\"tester::#ra6\",\"title\":\"Stage #10: CD-1\"}, \
+		{\"slug\":\"gq9\",\"tester_log_prefix\":\"tester::#gq9\",\"title\":\"Stage #11: CD-2\"}, \
+		{\"slug\":\"gp4\",\"tester_log_prefix\":\"tester::#gp4\",\"title\":\"Stage #12: CD-3\"} \
+	]" \
+	dist/main.out
 
 test_quoting_w_bash: build
 	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/bash \
@@ -119,11 +104,13 @@ test_quoting_w_bash: build
 	]" \
 	dist/main.out
 
-test_quoting_minimal: build
+test_redirection_w_bash: build
 	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/bash \
 	CODECRAFTERS_TEST_CASES_JSON="[ \
-		{\"slug\":\"ni6\",\"tester_log_prefix\":\"tester::#ni6\",\"title\":\"Stage #1: Quoting with single quotes\"}, \
-		{\"slug\":\"yt5\",\"tester_log_prefix\":\"tester::#yt5\",\"title\":\"Stage #3: Quoting with backslashes\"} \
+		{\"slug\":\"jv1\",\"tester_log_prefix\":\"tester::#jv1\",\"title\":\"Stage #13: Redirect stdout\"}, \
+		{\"slug\":\"vz4\",\"tester_log_prefix\":\"tester::#vz4\",\"title\":\"Stage #14: Redirect stderr\"}, \
+		{\"slug\":\"el9\",\"tester_log_prefix\":\"tester::#el9\",\"title\":\"Stage #15: Append stdout\"}, \
+		{\"slug\":\"un3\",\"tester_log_prefix\":\"tester::#un3\",\"title\":\"Stage #16: Append stderr\"} \
 	]" \
 	dist/main.out
 
@@ -131,14 +118,57 @@ test_bash:
 	make test_base_w_bash
 	make test_nav_w_bash
 	make test_quoting_w_bash
+	make test_redirection_w_bash
 
 
-test_redirection_w_bash: build
-	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/bash \
+test_base_w_ash: build
+	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/ash \
+	CODECRAFTERS_TEST_CASES_JSON="[ \
+		{\"slug\":\"oo8\",\"tester_log_prefix\":\"tester::#oo8\",\"title\":\"Stage #1: Init\"}, \
+		{\"slug\":\"cz2\",\"tester_log_prefix\":\"tester::#cz2\",\"title\":\"Stage #2: Invalid Command\"}, \
+		{\"slug\":\"ff0\",\"tester_log_prefix\":\"tester::#ff0\",\"title\":\"Stage #3: REPL\"}, \
+		{\"slug\":\"pn5\",\"tester_log_prefix\":\"tester::#pn5\",\"title\":\"Stage #4: Exit\"}, \
+		{\"slug\":\"iz3\",\"tester_log_prefix\":\"tester::#iz3\",\"title\":\"Stage #5: Echo\"}, \
+		{\"slug\":\"ez5\",\"tester_log_prefix\":\"tester::#ez5\",\"title\":\"Stage #6: Type built-in\"}, \
+		{\"slug\":\"mg5\",\"tester_log_prefix\":\"tester::#mg5\",\"title\":\"Stage #7: Type for executables\"}, \
+		{\"slug\":\"ip1\",\"tester_log_prefix\":\"tester::#ip1\",\"title\":\"Stage #8: Run a program\"} \
+	]" \
+	dist/main.out
+
+test_nav_w_ash: build
+	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/ash \
+	CODECRAFTERS_TEST_CASES_JSON="[ \
+		{\"slug\":\"ei0\",\"tester_log_prefix\":\"tester::#ei0\",\"title\":\"Stage #9: PWD\"}, \
+		{\"slug\":\"ra6\",\"tester_log_prefix\":\"tester::#ra6\",\"title\":\"Stage #10: CD-1\"}, \
+		{\"slug\":\"gq9\",\"tester_log_prefix\":\"tester::#gq9\",\"title\":\"Stage #11: CD-2\"}, \
+		{\"slug\":\"gp4\",\"tester_log_prefix\":\"tester::#gp4\",\"title\":\"Stage #12: CD-3\"} \
+	]" \
+	dist/main.out
+
+test_quoting_w_ash: build
+	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/ash \
+	CODECRAFTERS_TEST_CASES_JSON="[ \
+		{\"slug\":\"ni6\",\"tester_log_prefix\":\"tester::#ni6\",\"title\":\"Stage #1: Quoting with single quotes\"}, \
+		{\"slug\":\"tg6\",\"tester_log_prefix\":\"tester::#tg6\",\"title\":\"Stage #2: Quoting with double quotes\"}, \
+		{\"slug\":\"yt5\",\"tester_log_prefix\":\"tester::#yt5\",\"title\":\"Stage #3: Quoting with backslashes\"}, \
+		{\"slug\":\"le5\",\"tester_log_prefix\":\"tester::#le5\",\"title\":\"Stage #4: Quoting with single and double quotes\"}, \
+		{\"slug\":\"gu3\",\"tester_log_prefix\":\"tester::#gu3\",\"title\":\"Stage #5: Quoting with mixed quotes\"}, \
+		{\"slug\":\"qj0\",\"tester_log_prefix\":\"tester::#qj0\",\"title\":\"Stage #6: Quoting program names\"} \
+	]" \
+	dist/main.out
+
+test_redirection_w_ash: build
+	CODECRAFTERS_REPOSITORY_DIR=./internal/test_helpers/ash \
 	CODECRAFTERS_TEST_CASES_JSON="[ \
 		{\"slug\":\"jv1\",\"tester_log_prefix\":\"tester::#jv1\",\"title\":\"Stage #13: Redirect stdout\"}, \
 		{\"slug\":\"vz4\",\"tester_log_prefix\":\"tester::#vz4\",\"title\":\"Stage #14: Redirect stderr\"}, \
 		{\"slug\":\"el9\",\"tester_log_prefix\":\"tester::#el9\",\"title\":\"Stage #15: Append stdout\"}, \
 		{\"slug\":\"un3\",\"tester_log_prefix\":\"tester::#un3\",\"title\":\"Stage #16: Append stderr\"} \
 	]" \
-	dist/main.out
\ No newline at end of file
+	dist/main.out
+
+test_ash:
+	make test_base_w_ash
+	make test_nav_w_ash
+	make test_quoting_w_ash
+	make test_redirection_w_ash
diff --git a/internal/test_helpers/ash/codecrafters.yml b/internal/test_helpers/ash/codecrafters.yml
new file mode 100644
index 0000000..bff4295
--- /dev/null
+++ b/internal/test_helpers/ash/codecrafters.yml
@@ -0,0 +1,5 @@
+# Set this to true if you want debug logs.
+#
+# These can be VERY verbose, so we suggest turning them off
+# unless you really need them.
+debug: true
diff --git a/internal/test_helpers/ash/your_shell.sh b/internal/test_helpers/ash/your_shell.sh
new file mode 100755
index 0000000..4ab1be4
--- /dev/null
+++ b/internal/test_helpers/ash/your_shell.sh
@@ -0,0 +1,2 @@
+#!/bin/sh
+exec ash
\ No newline at end of file