diff --git a/testing/btest/Baseline/language.vector/.stderr b/testing/btest/Baseline/language.vector/.stderr
new file mode 100644
index 0000000000..f02f7b00a1
--- /dev/null
+++ b/testing/btest/Baseline/language.vector/.stderr
@@ -0,0 +1,4 @@
+### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
+warning in /Users/vern/warehouse/zeek/zeek-master.29Jul22/testing/btest/.tmp/language.vector/vector.zeek, line 173: mixing vector and scalar operands is deprecated (vector) (string)
+warning in /Users/vern/warehouse/zeek/zeek-master.29Jul22/testing/btest/.tmp/language.vector/vector.zeek, line 179: mixing vector and scalar operands is deprecated (string) (vector)
+warning in /Users/vern/warehouse/zeek/zeek-master.29Jul22/testing/btest/.tmp/language.vector/vector.zeek, line 182: mixing vector and scalar operands is deprecated (string) (vector)
diff --git a/testing/btest/Baseline/language.vector/out b/testing/btest/Baseline/language.vector/out
index 267848fa4e..ff4f7eb2ad 100644
--- a/testing/btest/Baseline/language.vector/out
+++ b/testing/btest/Baseline/language.vector/out
@@ -81,3 +81,5 @@ copy of a vector with holes (PASS)
 copy of a vector with trailing holes, [0, 2, 3, 77, , ], [0, 2, 3, 77, , ]
 hole in vector of managed types, 5, [[a=T], [a=T], , , [a=T]]
 hole in vector of managed types after replacing slice, 3, [[a=T], [a=T], ]
+left shift (PASS)
+right shift (PASS)
diff --git a/testing/btest/language/vector.zeek b/testing/btest/language/vector.zeek
index 7c461b4ce0..96b84eedf1 100644
--- a/testing/btest/language/vector.zeek
+++ b/testing/btest/language/vector.zeek
@@ -1,5 +1,6 @@
 # @TEST-EXEC: zeek -b %INPUT >out
 # @TEST-EXEC: btest-diff out
+# @TEST-EXEC: btest-diff .stderr
 
 function test_case(msg: string, expect: bool)
         {
@@ -229,6 +230,6 @@ event zeek_init()
 	# Test << and >> operators.
 	local v22 = v6 << 1;
 	local v23 = v6 >> 1;
-	test_case( "left shift", all_set(v22 == vector(20, 40, 60)) );
-	test_case( "right shift", all_set(v23 == vector(5, 10, 15)) );
+	test_case( "left shift", all_set(v22 == vector(20, 40, 60, 80)) );
+	test_case( "right shift", all_set(v23 == vector(5, 10, 15, 20)) );
 }