diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 74d8b84fd0..12ca19c2e1 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2020-05-19  Tom Tromey  <tromey@adacore.com>
+
+	* gdb.rust/simple.exp: Add some test descriptions.
+	(test_one_slice): Use with_test_prefix.
+
 2020-05-18  Tom de Vries  <tdevries@suse.de>
 
 	* gdb.base/gdb-caching-proc.exp: Use with_test_prefix.
diff --git a/gdb/testsuite/gdb.rust/simple.exp b/gdb/testsuite/gdb.rust/simple.exp
index 6daaf8415c..2653170df3 100644
--- a/gdb/testsuite/gdb.rust/simple.exp
+++ b/gdb/testsuite/gdb.rust/simple.exp
@@ -45,11 +45,11 @@ gdb_test "ptype c" " = i32"
 gdb_test "print sizeof(c)" " = 4"
 
 gdb_test "print c = 87" " = \\(\\)"
-gdb_test "print c" " = 87"
+gdb_test "print c" " = 87" "print after assignment"
 gdb_test "print c += 3" " = \\(\\)"
-gdb_test "print c" " = 90"
+gdb_test "print c" " = 90" "print after plus assignment"
 gdb_test "print c -= 90" " = \\(\\)"
-gdb_test "print c" " = 0"
+gdb_test "print c" " = 0" "print after minus assignment"
 gdb_test "print *&c" " = 0"
 gdb_test "print *(&c as &i32)" " = 0"
 gdb_test "print *(&c as *const i32)" " = 0"
@@ -88,7 +88,7 @@ gdb_test "print w\[2\] @ 2" " = \\\[3, 4\\\]"
 gdb_test "print w_ptr\[2\]" " = 3"
 gdb_test "print fromslice" " = 3"
 gdb_test "print slice\[0\]" " = 3"
-gdb_test "print slice as &\[i32\]\[0\]" " = 3"
+gdb_test "print slice as &\[i32\]\[0\]"
 
 gdb_test_sequence "ptype slice" "" {
     " = struct &\\\[i32\\\] \\{"
@@ -289,12 +289,14 @@ gdb_test "print st" \
     " = simple::StringAtOffset {field1: \"hello\", field2: 1, field3: \"world\"}"
 
 proc test_one_slice {svar length base range} {
-    global hex
+    with_test_prefix $range {
+	global hex
 
-    set result " = &\\\[.*\\\] \\{data_ptr: $hex, length: $length\\}"
+	set result " = &\\\[.*\\\] \\{data_ptr: $hex, length: $length\\}"
 
-    gdb_test "print $svar" $result
-    gdb_test "print &${base}\[${range}\]" $result
+	gdb_test "print $svar" $result
+	gdb_test "print &${base}\[${range}\]" $result
+    }
 }
 
 test_one_slice slice 1 w 2..3