diff --git a/internal/observability/quote_test.go b/internal/observability/quote_test.go
new file mode 100644
index 00000000..e65cff68
--- /dev/null
+++ b/internal/observability/quote_test.go
@@ -0,0 +1,38 @@
+package observability
+
+import (
+	"testing"
+)
+
+func TestQuoteIfNeededReturnsEmptyQuoted(t *testing.T) {
+	if got := quoteIfNeeded(""); got != `""` {
+		t.Fatalf("got %q, want %q", got, `""`)
+	}
+}
+
+func TestQuoteIfNeededReturnsPlainString(t *testing.T) {
+	if got := quoteIfNeeded("hello"); got != "hello" {
+		t.Fatalf("got %q, want %q", got, "hello")
+	}
+}
+
+func TestQuoteIfNeededQuotesStringWithEquals(t *testing.T) {
+	got := quoteIfNeeded("key=value")
+	if got != `"key=value"` {
+		t.Fatalf("got %q, want %q", got, `"key=value"`)
+	}
+}
+
+func TestQuoteIfNeededQuotesStringWithSpace(t *testing.T) {
+	got := quoteIfNeeded("hello world")
+	if got != `"hello world"` {
+		t.Fatalf("got %q, want %q", got, `"hello world"`)
+	}
+}
+
+func TestQuoteIfNeededQuotesStringWithNewline(t *testing.T) {
+	got := quoteIfNeeded("line1\nline2")
+	if got != `"line1\nline2"` {
+		t.Fatalf("got %q, want %q", got, `"line1\nline2"`)
+	}
+}