diff --git a/shell/hush_test/hush-vars/var-do-not-collapse-arithmetic-expansion-at-parse-time.right b/shell/hush_test/hush-vars/var-do-not-collapse-arithmetic-expansion-at-parse-time.right
new file mode 100644
index 0000000..81a1585
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-do-not-collapse-arithmetic-expansion-at-parse-time.right
@@ -0,0 +1,2 @@
+12
+9
diff --git a/shell/hush_test/hush-vars/var-do-not-collapse-arithmetic-expansion-at-parse-time.tests b/shell/hush_test/hush-vars/var-do-not-collapse-arithmetic-expansion-at-parse-time.tests
new file mode 100755
index 0000000..e97a08a
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-do-not-collapse-arithmetic-expansion-at-parse-time.tests
@@ -0,0 +1,3 @@
+unset a
+echo $((3 + ${a:=$((4 + 5))}))
+echo $a
diff --git a/shell/hush_test/hush-vars/var-do-not-expand-tilde-in-parameter-expansion-in-quotes.right b/shell/hush_test/hush-vars/var-do-not-expand-tilde-in-parameter-expansion-in-quotes.right
new file mode 100644
index 0000000..4b9b4f0
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-do-not-expand-tilde-in-parameter-expansion-in-quotes.right
@@ -0,0 +1 @@
+~root
diff --git a/shell/hush_test/hush-vars/var-do-not-expand-tilde-in-parameter-expansion-in-quotes.tests b/shell/hush_test/hush-vars/var-do-not-expand-tilde-in-parameter-expansion-in-quotes.tests
new file mode 100755
index 0000000..d8eb8fc
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-do-not-expand-tilde-in-parameter-expansion-in-quotes.tests
@@ -0,0 +1,2 @@
+unset a
+echo "${a:-~root}"
diff --git a/shell/hush_test/hush-vars/var-do-not-quote-backslashes-in-parameter-expansions-outside-quotes.right b/shell/hush_test/hush-vars/var-do-not-quote-backslashes-in-parameter-expansions-outside-quotes.right
new file mode 100644
index 0000000..030ebde
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-do-not-quote-backslashes-in-parameter-expansions-outside-quotes.right
@@ -0,0 +1 @@
+/b/c/
diff --git a/shell/hush_test/hush-vars/var-do-not-quote-backslashes-in-parameter-expansions-outside-quotes.tests b/shell/hush_test/hush-vars/var-do-not-quote-backslashes-in-parameter-expansions-outside-quotes.tests
new file mode 100755
index 0000000..fb93714
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-do-not-quote-backslashes-in-parameter-expansions-outside-quotes.tests
@@ -0,0 +1,3 @@
+a=/b/c/*
+b=\\
+echo ${a%$b*}
diff --git a/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-1.right b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-1.right
new file mode 100644
index 0000000..2da3272
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-1.right
@@ -0,0 +1 @@
+a_\_z_c
diff --git a/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-1.tests b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-1.tests
new file mode 100755
index 0000000..e4529c6
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-1.tests
@@ -0,0 +1,2 @@
+v="a\bc"
+echo ${v/\\b/_\\_\z_}
diff --git a/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-2.right b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-2.right
new file mode 100644
index 0000000..7447c0a
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-2.right
@@ -0,0 +1 @@
+ax/yc
diff --git a/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-2.tests b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-2.tests
new file mode 100755
index 0000000..2db1db8
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-2.tests
@@ -0,0 +1,2 @@
+v="abc"
+echo ${v/b/x/y}
diff --git a/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-3.right b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-3.right
new file mode 100644
index 0000000..5ea5ff8
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-3.right
@@ -0,0 +1 @@
+axcabc
diff --git a/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-3.tests b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-3.tests
new file mode 100755
index 0000000..0935e45
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-3.tests
@@ -0,0 +1,2 @@
+v="abcabc"
+echo ${v/b/x}
diff --git a/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-4.right b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-4.right
new file mode 100644
index 0000000..46dd750
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-4.right
@@ -0,0 +1 @@
+axcaxc
diff --git a/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-4.tests b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-4.tests
new file mode 100755
index 0000000..d8de843
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-4.tests
@@ -0,0 +1,2 @@
+v="abcabc"
+echo ${v//b/x}
diff --git a/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-5.right b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-5.right
new file mode 100644
index 0000000..699b27b
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-5.right
@@ -0,0 +1 @@
+axc
diff --git a/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-5.tests b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-5.tests
new file mode 100755
index 0000000..5523888
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-5.tests
@@ -0,0 +1,2 @@
+v="ab/c"
+echo ${v/b\//x}
diff --git a/shell/hush_test/hush-vars/var-runtime-quote-detection.right b/shell/hush_test/hush-vars/var-runtime-quote-detection.right
new file mode 100644
index 0000000..b554d9e
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-runtime-quote-detection.right
@@ -0,0 +1 @@
+<>
diff --git a/shell/hush_test/hush-vars/var-runtime-quote-detection.tests b/shell/hush_test/hush-vars/var-runtime-quote-detection.tests
new file mode 100755
index 0000000..e570631
--- /dev/null
+++ b/shell/hush_test/hush-vars/var-runtime-quote-detection.tests
@@ -0,0 +1 @@
+foo=\\ echo "<${foo#[\\]}>"