diff --git a/Tests/RunCMake/Syntax/AtWithVariable-stderr.txt b/Tests/RunCMake/Syntax/AtWithVariable-stderr.txt
new file mode 100644
index 000000000..5dcd4d7a1
--- /dev/null
+++ b/Tests/RunCMake/Syntax/AtWithVariable-stderr.txt
@@ -0,0 +1 @@
+-->wrong<--
diff --git a/Tests/RunCMake/Syntax/AtWithVariable.cmake b/Tests/RunCMake/Syntax/AtWithVariable.cmake
new file mode 100644
index 000000000..2bbf61db3
--- /dev/null
+++ b/Tests/RunCMake/Syntax/AtWithVariable.cmake
@@ -0,0 +1,9 @@
+set(right "wrong")
+set(var "\${right}")
+# Expanded here.
+set(ref "@var@")
+
+# 'right' is dereferenced because 'var' was dereferenced when
+# assigning to 'ref' above.
+string(CONFIGURE "${ref}" output)
+message("-->${output}<--")
diff --git a/Tests/RunCMake/Syntax/AtWithVariableAtOnly-stderr.txt b/Tests/RunCMake/Syntax/AtWithVariableAtOnly-stderr.txt
new file mode 100644
index 000000000..cbd1be472
--- /dev/null
+++ b/Tests/RunCMake/Syntax/AtWithVariableAtOnly-stderr.txt
@@ -0,0 +1 @@
+-->\${right}<--
diff --git a/Tests/RunCMake/Syntax/AtWithVariableAtOnly.cmake b/Tests/RunCMake/Syntax/AtWithVariableAtOnly.cmake
new file mode 100644
index 000000000..e06484c22
--- /dev/null
+++ b/Tests/RunCMake/Syntax/AtWithVariableAtOnly.cmake
@@ -0,0 +1,8 @@
+set(right "wrong")
+set(var "\${right}")
+# Expanded here.
+set(ref "@var@")
+
+# No dereference done at all.
+string(CONFIGURE "${ref}" output @ONLY)
+message("-->${output}<--")
diff --git a/Tests/RunCMake/Syntax/AtWithVariableAtOnlyFile-stderr.txt b/Tests/RunCMake/Syntax/AtWithVariableAtOnlyFile-stderr.txt
new file mode 100644
index 000000000..90bffb6c8
--- /dev/null
+++ b/Tests/RunCMake/Syntax/AtWithVariableAtOnlyFile-stderr.txt
@@ -0,0 +1,5 @@
+-->==>\${right}<==
+==><==
+==>\${var}<==
+==>\${empty}<==
+<--
diff --git a/Tests/RunCMake/Syntax/AtWithVariableAtOnlyFile.cmake b/Tests/RunCMake/Syntax/AtWithVariableAtOnlyFile.cmake
new file mode 100644
index 000000000..bdd7bcd25
--- /dev/null
+++ b/Tests/RunCMake/Syntax/AtWithVariableAtOnlyFile.cmake
@@ -0,0 +1,9 @@
+set(right "wrong")
+set(var "\${right}")
+
+configure_file(
+  "${CMAKE_CURRENT_SOURCE_DIR}/atfile.txt.in"
+  "${CMAKE_CURRENT_BINARY_DIR}/atfile.txt"
+  @ONLY)
+file(READ "${CMAKE_CURRENT_BINARY_DIR}/atfile.txt" output)
+message("-->${output}<--")
diff --git a/Tests/RunCMake/Syntax/AtWithVariableEmptyExpansion-stderr.txt b/Tests/RunCMake/Syntax/AtWithVariableEmptyExpansion-stderr.txt
new file mode 100644
index 000000000..cbd1be472
--- /dev/null
+++ b/Tests/RunCMake/Syntax/AtWithVariableEmptyExpansion-stderr.txt
@@ -0,0 +1 @@
+-->\${right}<--
diff --git a/Tests/RunCMake/Syntax/AtWithVariableEmptyExpansion.cmake b/Tests/RunCMake/Syntax/AtWithVariableEmptyExpansion.cmake
new file mode 100644
index 000000000..840c7f0d6
--- /dev/null
+++ b/Tests/RunCMake/Syntax/AtWithVariableEmptyExpansion.cmake
@@ -0,0 +1,8 @@
+# Literal since 'var' is not defined.
+set(ref "@var@")
+set(right "wrong")
+set(var "\${right}")
+
+# 'var' is dereferenced here.
+string(CONFIGURE "${ref}" output)
+message("-->${output}<--")
diff --git a/Tests/RunCMake/Syntax/AtWithVariableEmptyExpansionAtOnly-stderr.txt b/Tests/RunCMake/Syntax/AtWithVariableEmptyExpansionAtOnly-stderr.txt
new file mode 100644
index 000000000..cbd1be472
--- /dev/null
+++ b/Tests/RunCMake/Syntax/AtWithVariableEmptyExpansionAtOnly-stderr.txt
@@ -0,0 +1 @@
+-->\${right}<--
diff --git a/Tests/RunCMake/Syntax/AtWithVariableEmptyExpansionAtOnly.cmake b/Tests/RunCMake/Syntax/AtWithVariableEmptyExpansionAtOnly.cmake
new file mode 100644
index 000000000..b657506be
--- /dev/null
+++ b/Tests/RunCMake/Syntax/AtWithVariableEmptyExpansionAtOnly.cmake
@@ -0,0 +1,8 @@
+# Literal since 'var' is not defined.
+set(ref "@var@")
+set(right "wrong")
+set(var "\${right}")
+
+# 'var' is dereferenced, but now 'right'
+string(CONFIGURE "${ref}" output @ONLY)
+message("-->${output}<--")
diff --git a/Tests/RunCMake/Syntax/AtWithVariableFile-stderr.txt b/Tests/RunCMake/Syntax/AtWithVariableFile-stderr.txt
new file mode 100644
index 000000000..43f029fe0
--- /dev/null
+++ b/Tests/RunCMake/Syntax/AtWithVariableFile-stderr.txt
@@ -0,0 +1,5 @@
+-->==>\${right}<==
+==><==
+==>\${right}<==
+==><==
+<--
diff --git a/Tests/RunCMake/Syntax/AtWithVariableFile.cmake b/Tests/RunCMake/Syntax/AtWithVariableFile.cmake
new file mode 100644
index 000000000..c70909928
--- /dev/null
+++ b/Tests/RunCMake/Syntax/AtWithVariableFile.cmake
@@ -0,0 +1,8 @@
+set(right "wrong")
+set(var "\${right}")
+
+configure_file(
+  "${CMAKE_CURRENT_SOURCE_DIR}/atfile.txt.in"
+  "${CMAKE_CURRENT_BINARY_DIR}/atfile.txt")
+file(READ "${CMAKE_CURRENT_BINARY_DIR}/atfile.txt" output)
+message("-->${output}<--")
diff --git a/Tests/RunCMake/Syntax/EscapeQuotes-stderr.txt b/Tests/RunCMake/Syntax/EscapeQuotes-stderr.txt
new file mode 100644
index 000000000..077272d4b
--- /dev/null
+++ b/Tests/RunCMake/Syntax/EscapeQuotes-stderr.txt
@@ -0,0 +1 @@
+-->"<--
diff --git a/Tests/RunCMake/Syntax/EscapeQuotes.cmake b/Tests/RunCMake/Syntax/EscapeQuotes.cmake
new file mode 100644
index 000000000..46d2b6f47
--- /dev/null
+++ b/Tests/RunCMake/Syntax/EscapeQuotes.cmake
@@ -0,0 +1,9 @@
+set(var "\"")
+set(ref "@var@")
+set(rref "\${var}")
+
+string(CONFIGURE "${ref}" output ESCAPE_QUOTES)
+message("-->${output}<--")
+
+string(CONFIGURE "${rref}" output ESCAPE_QUOTES)
+message("-->${output}<--")
diff --git a/Tests/RunCMake/Syntax/EscapedAt-stderr.txt b/Tests/RunCMake/Syntax/EscapedAt-stderr.txt
new file mode 100644
index 000000000..a51c0d3fa
--- /dev/null
+++ b/Tests/RunCMake/Syntax/EscapedAt-stderr.txt
@@ -0,0 +1 @@
+-->\\n<--
diff --git a/Tests/RunCMake/Syntax/EscapedAt.cmake b/Tests/RunCMake/Syntax/EscapedAt.cmake
new file mode 100644
index 000000000..1ced62085
--- /dev/null
+++ b/Tests/RunCMake/Syntax/EscapedAt.cmake
@@ -0,0 +1,5 @@
+set(var "n")
+set(ref "\\@var@")
+
+string(CONFIGURE "${ref}" output)
+message("-->${output}<--")
diff --git a/Tests/RunCMake/Syntax/ExpandInAt-stderr.txt b/Tests/RunCMake/Syntax/ExpandInAt-stderr.txt
new file mode 100644
index 000000000..5da8b60c5
--- /dev/null
+++ b/Tests/RunCMake/Syntax/ExpandInAt-stderr.txt
@@ -0,0 +1 @@
+-->@foo@<--
diff --git a/Tests/RunCMake/Syntax/ExpandInAt.cmake b/Tests/RunCMake/Syntax/ExpandInAt.cmake
new file mode 100644
index 000000000..98f0277da
--- /dev/null
+++ b/Tests/RunCMake/Syntax/ExpandInAt.cmake
@@ -0,0 +1,6 @@
+set("\${varname}" bar)
+set(var foo)
+set(ref "@\${var}@")
+
+string(CONFIGURE "${ref}" output)
+message("-->${output}<--")
diff --git a/Tests/RunCMake/Syntax/ParenInENV-result.txt b/Tests/RunCMake/Syntax/ParenInENV-result.txt
new file mode 100644
index 000000000..d00491fd7
--- /dev/null
+++ b/Tests/RunCMake/Syntax/ParenInENV-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/Syntax/ParenInENV-stderr.txt b/Tests/RunCMake/Syntax/ParenInENV-stderr.txt
new file mode 100644
index 000000000..7ecfe1124
--- /dev/null
+++ b/Tests/RunCMake/Syntax/ParenInENV-stderr.txt
@@ -0,0 +1,20 @@
+CMake Warning \(dev\) at CMakeLists.txt:3 \(include\):
+  Syntax Warning in cmake code at
+
+    .*/Tests/RunCMake/Syntax/ParenInENV.cmake:2:21
+
+  Argument not separated from preceding token by whitespace.
+This warning is for project developers.  Use -Wno-dev to suppress it.
+
+CMake Error at ParenInENV.cmake:2 \(message\):
+  Syntax error in cmake code at
+
+    .*/Tests/RunCMake/Syntax/ParenInENV.cmake:2
+
+  when parsing string
+
+    -->\$ENV{e
+
+  syntax error, unexpected \$end, expecting } \(9\)
+Call Stack \(most recent call first\):
+  CMakeLists.txt:3 \(include\)
diff --git a/Tests/RunCMake/Syntax/ParenInENV.cmake b/Tests/RunCMake/Syntax/ParenInENV.cmake
new file mode 100644
index 000000000..148f7266d
--- /dev/null
+++ b/Tests/RunCMake/Syntax/ParenInENV.cmake
@@ -0,0 +1,2 @@
+set("ENV{e(x)}" value)
+message(-->$ENV{e(x)}<--)
diff --git a/Tests/RunCMake/Syntax/ParenInQuotedENV-stderr.txt b/Tests/RunCMake/Syntax/ParenInQuotedENV-stderr.txt
new file mode 100644
index 000000000..7020c7e73
--- /dev/null
+++ b/Tests/RunCMake/Syntax/ParenInQuotedENV-stderr.txt
@@ -0,0 +1 @@
+-->value<--
diff --git a/Tests/RunCMake/Syntax/ParenInQuotedENV.cmake b/Tests/RunCMake/Syntax/ParenInQuotedENV.cmake
new file mode 100644
index 000000000..633371740
--- /dev/null
+++ b/Tests/RunCMake/Syntax/ParenInQuotedENV.cmake
@@ -0,0 +1,2 @@
+set("ENV{e(x)}" value)
+message("-->$ENV{e(x)}<--")
diff --git a/Tests/RunCMake/Syntax/RunCMakeTest.cmake b/Tests/RunCMake/Syntax/RunCMakeTest.cmake
index 5f05cfc37..dcabd8ac4 100644
--- a/Tests/RunCMake/Syntax/RunCMakeTest.cmake
+++ b/Tests/RunCMake/Syntax/RunCMakeTest.cmake
@@ -52,3 +52,16 @@ run_cmake(UnterminatedString)
 run_cmake(UnterminatedBracket0)
 run_cmake(UnterminatedBracket1)
 run_cmake(UnterminatedBracketComment)
+
+# Variable expansion tests
+run_cmake(ExpandInAt)
+run_cmake(EscapedAt)
+run_cmake(EscapeQuotes)
+run_cmake(AtWithVariable)
+run_cmake(AtWithVariableEmptyExpansion)
+run_cmake(AtWithVariableAtOnly)
+run_cmake(AtWithVariableEmptyExpansionAtOnly)
+run_cmake(AtWithVariableFile)
+run_cmake(AtWithVariableAtOnlyFile)
+run_cmake(ParenInENV)
+run_cmake(ParenInQuotedENV)
diff --git a/Tests/RunCMake/Syntax/atfile.txt.in b/Tests/RunCMake/Syntax/atfile.txt.in
new file mode 100644
index 000000000..3775919f6
--- /dev/null
+++ b/Tests/RunCMake/Syntax/atfile.txt.in
@@ -0,0 +1,4 @@
+==>@var@<==
+==>@empty@<==
+==>${var}<==
+==>${empty}<==