diff --git a/features/gemspec.feature b/features/gemspec.feature
index 21a10daa..c11b379e 100644
--- a/features/gemspec.feature
+++ b/features/gemspec.feature
@@ -68,3 +68,12 @@ Feature: appraisals using an existing gemspec
     When I run `bundle exec rake appraisal version --trace`
     Then the output should contain "Loaded 1.3.0"
 
+  Scenario: run a gem in the gemspec via path
+    And I write to "Gemfile" with:
+    """
+    gemspec :path => './specdir'
+    """
+    When I add "appraisal" from this project as a dependency
+    When I successfully run `bundle exec rake appraisal:install --trace`
+    When I run `bundle exec rake appraisal version --trace`
+    Then the output should contain "Loaded 1.3.0"
diff --git a/lib/appraisal/dependency.rb b/lib/appraisal/dependency.rb
index de226871..c217e861 100644
--- a/lib/appraisal/dependency.rb
+++ b/lib/appraisal/dependency.rb
@@ -9,8 +9,7 @@ def initialize(name, requirements)
     end
 
     def to_s
-      gem_name = %{gem "#{name}"}
-      if requirements.nil? || requirements.empty?
+      if no_requirements?
         gem_name
       else
         "#{gem_name}, #{inspect_requirements}"
@@ -19,6 +18,14 @@ def to_s
 
     private
 
+    def gem_name
+      %{gem "#{name}"}
+    end
+
+    def no_requirements?
+      requirements.nil? || requirements.empty?
+    end
+
     def inspect_requirements
       requirements.map { |requirement| requirement.inspect.gsub(/^\{|\}$/, '') }.join(", ")
     end
diff --git a/lib/appraisal/file.rb b/lib/appraisal/file.rb
index b4148838..37e22a02 100644
--- a/lib/appraisal/file.rb
+++ b/lib/appraisal/file.rb
@@ -30,7 +30,7 @@ def appraise(name, &block)
     private
 
     def run(definitions)
-      instance_eval definitions, __FILE__, __LINE__
+      instance_eval(definitions, __FILE__, __LINE__)
     end
 
     def path
diff --git a/lib/appraisal/gemfile.rb b/lib/appraisal/gemfile.rb
index 8c3e8402..1287faee 100644
--- a/lib/appraisal/gemfile.rb
+++ b/lib/appraisal/gemfile.rb
@@ -38,7 +38,7 @@ def to_s
 
     def dup
       gemfile = Gemfile.new
-      @sources.each { |source| gemfile.source source }
+      @sources.each { |source| gemfile.source(source) }
       dependencies.each do |dependency|
         gemfile.gem(dependency.name, *dependency.requirements)
       end
diff --git a/lib/appraisal/gemspec.rb b/lib/appraisal/gemspec.rb
index 6061bc54..6569ecb9 100644
--- a/lib/appraisal/gemspec.rb
+++ b/lib/appraisal/gemspec.rb
@@ -14,7 +14,9 @@ def exists?
     end
 
     def to_s
-      "gemspec #{exported_options.inspect.gsub(/^\{|\}$/, '')}" if exists?
+      if exists?
+        "gemspec #{exported_options.inspect.gsub(/^\{|\}$/, '')}"
+      end
     end
 
     private