diff --git a/lib/spandex.ex b/lib/spandex.ex
index c4de405..a757193 100644
--- a/lib/spandex.ex
+++ b/lib/spandex.ex
@@ -37,7 +37,7 @@ defmodule Spandex do
     strategy = opts[:strategy]
 
     if strategy.trace_active?(opts[:trace_key]) do
-      Logger.error("Tried to start a trace over top of another trace: #{name}.")
+      Logger.error("Tried to start a trace over top of another trace. name: #{inspect(name)}")
       {:error, :trace_running}
     else
       do_start_trace(name, opts)
@@ -351,7 +351,7 @@ defmodule Spandex do
     strategy = opts[:strategy]
 
     if strategy.trace_active?(opts[:trace_key]) do
-      Logger.error("Tried to continue a trace over top of another trace: #{name}.")
+      Logger.error("Tried to continue a trace over top of another trace. name: #{inspect(name)}")
       {:error, :trace_already_present}
     else
       do_continue_trace(name, span_context, opts)
@@ -393,7 +393,7 @@ defmodule Spandex do
     strategy = opts[:strategy]
 
     if strategy.trace_active?(opts[:trace_key]) do
-      Logger.error("Tried to continue a trace over top of another trace: #{name}.")
+      Logger.error("Tried to continue a trace over top of another trace. name: #{inspect(name)}")
       {:error, :trace_already_present}
     else
       do_continue_trace_from_span(name, span, opts)
diff --git a/lib/tracer.ex b/lib/tracer.ex
index a6242b7..478ed21 100644
--- a/lib/tracer.ex
+++ b/lib/tracer.ex
@@ -119,7 +119,7 @@ defmodule Spandex.Tracer do
       end
 
       @impl Spandex.Tracer
-      defmacro trace(name, opts \\ [], do: body) do
+      defmacro trace(name, opts \\ [], do: body) when is_binary(name) do
         quote do
           opts = unquote(opts)
 
@@ -140,7 +140,7 @@ defmodule Spandex.Tracer do
       end
 
       @impl Spandex.Tracer
-      defmacro span(name, opts \\ [], do: body) do
+      defmacro span(name, opts \\ [], do: body) when is_binary(name) do
         quote do
           opts = unquote(opts)
           name = unquote(name)