diff --git a/lib/riemann/tools.rb b/lib/riemann/tools.rb
index c7574461..a5549698 100644
--- a/lib/riemann/tools.rb
+++ b/lib/riemann/tools.rb
@@ -52,7 +52,7 @@ def options
 
     def attributes
       @attributes ||= Hash[options[:attribute].map do |attr|
-        k, v = attr.split(/=/)
+        k, v = attr.split('=')
         [k, v] if k && v
       end]
     end
diff --git a/lib/riemann/tools/diskstats.rb b/lib/riemann/tools/diskstats.rb
index 5de1c2ab..9fb42ee3 100644
--- a/lib/riemann/tools/diskstats.rb
+++ b/lib/riemann/tools/diskstats.rb
@@ -80,7 +80,7 @@ def tick
             next unless service =~ /io time$/
 
             report(
-              service: "diskstats #{service.gsub(/time/, 'util')}",
+              service: "diskstats #{service.gsub('time', 'util')}",
               metric: (delta.to_f / (opts[:interval] * 1000)),
               state: 'ok',
             )
diff --git a/lib/riemann/tools/health.rb b/lib/riemann/tools/health.rb
index 3d4ab54f..a9f59a06 100644
--- a/lib/riemann/tools/health.rb
+++ b/lib/riemann/tools/health.rb
@@ -188,7 +188,7 @@ def linux_load
       end
 
       def linux_memory
-        m = File.read('/proc/meminfo').split(/\n/).each_with_object({}) do |line, info|
+        m = File.read('/proc/meminfo').split("\n").each_with_object({}) do |line, info|
           x = line.split(/:?\s+/)
           # Assume kB...
           info[x[0]] = x[1].to_i
diff --git a/tools/riemann-docker/lib/riemann/tools/docker.rb b/tools/riemann-docker/lib/riemann/tools/docker.rb
index 51fcfc43..a20163b2 100644
--- a/tools/riemann-docker/lib/riemann/tools/docker.rb
+++ b/tools/riemann-docker/lib/riemann/tools/docker.rb
@@ -121,7 +121,7 @@ def memory(_id, name, stats)
       end
 
       def disk
-        `df -P`.split(/\n/).each do |r|
+        `df -P`.split("\n").each do |r|
           f = r.split(/\s+/)
           next if f[0] == 'Filesystem'
           next unless f[0] =~ %r{/} # Needs at least one slash in the mount path
diff --git a/tools/riemann-riak/lib/riemann/tools/riak.rb b/tools/riemann-riak/lib/riemann/tools/riak.rb
index 182efcd9..fe253cf8 100644
--- a/tools/riemann-riak/lib/riemann/tools/riak.rb
+++ b/tools/riemann-riak/lib/riemann/tools/riak.rb
@@ -201,7 +201,7 @@ def stats_riak_admin
         str = `riak-admin status`
         raise 'riak-admin failed' unless $CHILD_STATUS == 0
 
-        Hash[str.split(/\n/).map { |i| i.split(/ : /) }]
+        Hash[str.split("\n").map { |i| i.split(' : ') }]
       end
 
       # Get current stats as a hash