diff --git a/testing/btest/Baseline/language.vector/out b/testing/btest/Baseline/language.vector/out
index b75cf8048e..d80f2cf375 100644
--- a/testing/btest/Baseline/language.vector/out
+++ b/testing/btest/Baseline/language.vector/out
@@ -61,6 +61,11 @@ access element (PASS)
 * operator (PASS)
 / operator (PASS)
 % operator (PASS)
++ operator [string] (PASS)
++ operator [string] (PASS)
+== operator [string] (PASS)
+== operator [string] (PASS)
+== operator [string] (PASS)
 && operator (PASS)
 || operator (PASS)
 += operator (PASS)
diff --git a/testing/btest/language/vector.zeek b/testing/btest/language/vector.zeek
index a0ef9a9f1e..5fa67a2a77 100644
--- a/testing/btest/language/vector.zeek
+++ b/testing/btest/language/vector.zeek
@@ -173,6 +173,26 @@ event zeek_init()
 	test_case( "/ operator", v10[0] == 10 && v10[1] == 10 && v10[2] == 10 );
 	test_case( "% operator", v11[0] == 0 && v11[1] == 0 && v11[2] == 0 );
 
+	local vs1: vector of string = vector( "foo", "bar" );
+	local vs2: vector of string = vector( "xxx", "yyy" );
+	local vs3: vector of string = vector( "xxx", "bar" );
+
+	local vss = vs1 + vs2;
+	test_case( "+ operator [string]", vss[0] == "fooxxx" && vss[1] == "baryyy" );
+
+	local vss2 = vs1 + "@";
+	test_case( "+ operator [string]", vss2[0] == "foo@" && vss2[1] == "bar@" );
+
+	local vss3 = (vs1 == vs3);
+	test_case( "== operator [string]", vss3[0] == F && vss3[1] == T );
+
+	local vss4 = (vs1 == "bar");
+	test_case( "== operator [string]", vss4[0] == F && vss4[1] == T );
+
+	local vss5 = ("bar" == vs1);
+	test_case( "== operator [string]", vss5[0] == F && vss5[1] == T );
+		# !=, <, >, <=, >= are handled the same as ==, skipping tests
+
 	# Test &&,|| of two vectors
 
 	test_case( "&& operator", v14[0] == F && v14[1] == F && v14[2] == T );