diff --git a/tests/various/logger_error.ys b/tests/various/logger_error.ys
new file mode 100644
index 000000000..46fe7f506
--- /dev/null
+++ b/tests/various/logger_error.ys
@@ -0,0 +1,6 @@
+logger -werror "is implicitly declared." -expect error "is implicitly declared." 1
+read_verilog << EOF
+module top(...);
+	assign b = w;
+endmodule
+EOF
diff --git a/tests/various/logger_nowarning.ys b/tests/various/logger_nowarning.ys
new file mode 100644
index 000000000..87cbbc644
--- /dev/null
+++ b/tests/various/logger_nowarning.ys
@@ -0,0 +1,6 @@
+logger -expect-no-warnings -nowarn "is implicitly declared."
+read_verilog << EOF
+module top(...);
+	assign b = w;
+endmodule
+EOF
diff --git a/tests/various/logger_warn.ys b/tests/various/logger_warn.ys
new file mode 100644
index 000000000..2316ae4c6
--- /dev/null
+++ b/tests/various/logger_warn.ys
@@ -0,0 +1,6 @@
+logger -warn "Successfully finished Verilog frontend." -expect warning "Successfully finished Verilog frontend." 1
+read_verilog << EOF
+module top(...);
+	assign b = w;
+endmodule
+EOF
diff --git a/tests/various/logger_warning.ys b/tests/various/logger_warning.ys
new file mode 100644
index 000000000..642b1b97b
--- /dev/null
+++ b/tests/various/logger_warning.ys
@@ -0,0 +1,6 @@
+logger -expect warning "is implicitly declared." 2
+read_verilog << EOF
+module top(...);
+	assign b = w;
+endmodule
+EOF