diff --git a/test/blank1.go b/test/blank1.go
index 5bc1efce5fd..bcc78466dc2 100644
--- a/test/blank1.go
+++ b/test/blank1.go
@@ -9,4 +9,5 @@ package _	// ERROR "invalid package name _"
 func main() {
 	_()	// ERROR "cannot use _ as value"
 	x := _+1	// ERROR "cannot use _ as value"
+	_ = x
 }
diff --git a/test/fixedbugs/bug014.go b/test/fixedbugs/bug014.go
index dac2ce5174a..38a6e51abcb 100644
--- a/test/fixedbugs/bug014.go
+++ b/test/fixedbugs/bug014.go
@@ -11,4 +11,5 @@ func main() {
 	var c01 uint8 = '\07';  // ERROR "oct|char"
 	var cx0 uint8 = '\x0';  // ERROR "hex|char"
 	var cx1 uint8 = '\x';  // ERROR "hex|char"
+	_, _, _, _ = c00, c01, cx0, cx1
 }
diff --git a/test/fixedbugs/bug108.go b/test/fixedbugs/bug108.go
index 5c7649f0819..10e406de6ea 100644
--- a/test/fixedbugs/bug108.go
+++ b/test/fixedbugs/bug108.go
@@ -7,4 +7,5 @@
 package main
 func f() {
 	v := 1 << 1025;		// ERROR "overflow|stupid shift"
+	_ = v
 }
diff --git a/test/fixedbugs/bug175.go b/test/fixedbugs/bug175.go
index a8f6e3ca406..1ca14150765 100644
--- a/test/fixedbugs/bug175.go
+++ b/test/fixedbugs/bug175.go
@@ -10,5 +10,5 @@ func f() (int, bool) { return 0, true }
 
 func main() {
 	x, y := f(), 2;	// ERROR "multi"
+	_, _ = x, y
 }
-
diff --git a/test/fixedbugs/bug363.go b/test/fixedbugs/bug363.go
index 04fcfe1a875..9347ec28b62 100644
--- a/test/fixedbugs/bug363.go
+++ b/test/fixedbugs/bug363.go
@@ -17,5 +17,5 @@ func main() {
 	println(b)
 
 	var c int64 = (1<<i) + 4.0  // ok - it's all int64
-	println(b)
+	println(c)
 }
diff --git a/test/func4.go b/test/func4.go
index 69ce56a1973..2a1a932de90 100644
--- a/test/func4.go
+++ b/test/func4.go
@@ -11,4 +11,5 @@ var notmain func()
 func main() {
 	var x = &main		// ERROR "address of|invalid"
 	main = notmain	// ERROR "assign to|invalid"
+	_ = x
 }
diff --git a/test/indirect1.go b/test/indirect1.go
index 0fd5c19d4d4..ecb4f138ace 100644
--- a/test/indirect1.go
+++ b/test/indirect1.go
@@ -65,4 +65,5 @@ func f() {
 		cap(b2)+	// ERROR "illegal|invalid|must be"
 		cap(b3)+
 		cap(b4)	// ERROR "illegal|invalid|must be"
+	_ = x
 }