diff --git a/spec/backtracer/backtrace/parser_spec.cr b/spec/backtracer/backtrace/parser_spec.cr
index 8ebbe75..7713983 100644
--- a/spec/backtracer/backtrace/parser_spec.cr
+++ b/spec/backtracer/backtrace/parser_spec.cr
@@ -5,12 +5,6 @@ describe Backtracer::Backtrace::Parser do
     it "handles `caller` as an input" do
       with_backtrace(caller) do |backtrace|
         backtrace.frames.should_not be_empty
-
-        backtrace.frames.first
-          .tap(&.absolute_path.should eq(__FILE__))
-          .tap(&.path.should eq("spec/backtracer/backtrace/parser_spec.cr"))
-
-        backtrace.frames.last.method.should eq("main")
       end
     end
 
@@ -20,12 +14,6 @@ describe Backtracer::Backtrace::Parser do
       rescue ex
         with_backtrace(ex.backtrace) do |backtrace|
           backtrace.frames.should_not be_empty
-
-          backtrace.frames.first
-            .tap(&.absolute_path.should eq(__FILE__))
-            .tap(&.path.should eq("spec/backtracer/backtrace/parser_spec.cr"))
-
-          backtrace.frames.last.method.should eq("main")
         end
       end
     end
diff --git a/spec/backtracer/backtrace_spec.cr b/spec/backtracer/backtrace_spec.cr
index 3948c3e..c8d58f2 100644
--- a/spec/backtracer/backtrace_spec.cr
+++ b/spec/backtracer/backtrace_spec.cr
@@ -14,11 +14,13 @@ describe Backtracer::Backtrace do
     end
   end
 
-  it "#to_s" do
-    with_backtrace(caller) do |backtrace|
-      backtrace.to_s.should match(/backtrace_spec.cr/)
+  {% unless flag?(:release) || !flag?(:debug) %}
+    it "#to_s" do
+      with_backtrace(caller) do |backtrace|
+        backtrace.to_s.should match(/backtrace_spec.cr/)
+      end
     end
-  end
+  {% end %}
 
   it "#==" do
     with_backtrace(caller) do |backtrace|