diff --git a/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-1.right b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-1.right
new file mode 100644
index 000000000..2da327222
--- /dev/null
+++ b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-1.right
@@ -0,0 +1 @@
+a_\_z_c
diff --git a/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-1.tests b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-1.tests
new file mode 100755
index 000000000..e4529c631
--- /dev/null
+++ b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-1.tests
@@ -0,0 +1,2 @@
+v="a\bc"
+echo ${v/\\b/_\\_\z_}
diff --git a/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-2.right b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-2.right
new file mode 100644
index 000000000..7447c0a04
--- /dev/null
+++ b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-2.right
@@ -0,0 +1 @@
+ax/yc
diff --git a/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-2.tests b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-2.tests
new file mode 100755
index 000000000..2db1db897
--- /dev/null
+++ b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-2.tests
@@ -0,0 +1,2 @@
+v="abc"
+echo ${v/b/x/y}
diff --git a/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-3.right b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-3.right
new file mode 100644
index 000000000..5ea5ff892
--- /dev/null
+++ b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-3.right
@@ -0,0 +1 @@
+axcabc
diff --git a/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-3.tests b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-3.tests
new file mode 100755
index 000000000..0935e4509
--- /dev/null
+++ b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-3.tests
@@ -0,0 +1,2 @@
+v="abcabc"
+echo ${v/b/x}
diff --git a/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-4.right b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-4.right
new file mode 100644
index 000000000..46dd750c1
--- /dev/null
+++ b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-4.right
@@ -0,0 +1 @@
+axcaxc
diff --git a/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-4.tests b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-4.tests
new file mode 100755
index 000000000..d8de84347
--- /dev/null
+++ b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-4.tests
@@ -0,0 +1,2 @@
+v="abcabc"
+echo ${v//b/x}
diff --git a/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-5.right b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-5.right
new file mode 100644
index 000000000..699b27b0c
--- /dev/null
+++ b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-5.right
@@ -0,0 +1 @@
+axc
diff --git a/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-5.tests b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-5.tests
new file mode 100755
index 000000000..552388877
--- /dev/null
+++ b/shell/ash_test/ash-vars/var-pattern-replacement-in-parameter-expansion-5.tests
@@ -0,0 +1,2 @@
+v="ab/c"
+echo ${v/b\//x}