12 files changed, 24 insertions, 24 deletions
diff --git a/tests/BS23.cpp b/tests/BS23.cpp
index c2eb345..8bbcd96 100644
--- a/tests/BS23.cpp
+++ b/tests/BS23.cpp
@@ -23,9 +23,9 @@
 #include <iostream>
 #include <iomanip>
 
-// y' = y (y == C*exp(t))
+// y' = y (y == C*exp(x))
 double
-f(double t, double y)
+f(double x, double y)
 {
   return y;
 }
diff --git a/tests/CK45.cpp b/tests/CK45.cpp
index c040436..0c275df 100644
--- a/tests/CK45.cpp
+++ b/tests/CK45.cpp
@@ -23,9 +23,9 @@
 #include <iostream>
 #include <iomanip>
 
-// y' = y (y == C*exp(t))
+// y' = y (y == C*exp(x))
 double
-f(double t, double y)
+f(double x, double y)
 {
   return y;
 }
diff --git a/tests/Complex.cpp b/tests/Complex.cpp
index df517b0..3d290c0 100644
--- a/tests/Complex.cpp
+++ b/tests/Complex.cpp
@@ -24,9 +24,9 @@
 #include <iostream>
 #include <iomanip>
 
-// y' = -y (y == C*exp(t))
+// y' = -y (y == C*exp(x))
 std::complex<double>
-f(double t, std::complex<double> y)
+f(double x, std::complex<double> y)
 {
   return y;
 }
diff --git a/tests/DP45.cpp b/tests/DP45.cpp
index 12c3202..6367dc7 100644
--- a/tests/DP45.cpp
+++ b/tests/DP45.cpp
@@ -23,9 +23,9 @@
 #include <iostream>
 #include <iomanip>
 
-// y' = y (y == C*exp(t))
+// y' = y (y == C*exp(x))
 double
-f(double t, double y)
+f(double x, double y)
 {
   return y;
 }
diff --git a/tests/EquationSystem.cpp b/tests/EquationSystem.cpp
index 6919506..6d83917 100644
--- a/tests/EquationSystem.cpp
+++ b/tests/EquationSystem.cpp
@@ -25,13 +25,13 @@
 
 typedef vZ::EquationSystem<2> Y;
 
-// y'' = y (y == C*exp(t) + D*exp(-t))
+// y'' = y (y == C*exp(x) + D*exp(-x))
 //
 // Split as:
 //   y' = v
 //   v' = y
 Y
-f(double t, Y y)
+f(double x, Y y)
 {
   Y r;
   r[0] = y[1];
diff --git a/tests/Euler.cpp b/tests/Euler.cpp
index fa2d97c..d9c6d18 100644
--- a/tests/Euler.cpp
+++ b/tests/Euler.cpp
@@ -23,9 +23,9 @@
 #include <iostream>
 #include <iomanip>
 
-// y' = y (y == C*exp(t))
+// y' = y (y == C*exp(x))
 double
-f(double t, double y)
+f(double x, double y)
 {
   return y;
 }
diff --git a/tests/HE12.cpp b/tests/HE12.cpp
index fd2fb56..19c5e59 100644
--- a/tests/HE12.cpp
+++ b/tests/HE12.cpp
@@ -23,9 +23,9 @@
 #include <iostream>
 #include <iomanip>
 
-// y' = y (y == C*exp(t))
+// y' = y (y == C*exp(x))
 double
-f(double t, double y)
+f(double x, double y)
 {
   return y;
 }
diff --git a/tests/Heun.cpp b/tests/Heun.cpp
index d9e4cbe..d4f02bc 100644
--- a/tests/Heun.cpp
+++ b/tests/Heun.cpp
@@ -23,9 +23,9 @@
 #include <iostream>
 #include <iomanip>
 
-// y' = y (y == C*exp(t))
+// y' = y (y == C*exp(x))
 double
-f(double t, double y)
+f(double x, double y)
 {
   return y;
 }
diff --git a/tests/Midpoint.cpp b/tests/Midpoint.cpp
index f667ca5..01c8853 100644
--- a/tests/Midpoint.cpp
+++ b/tests/Midpoint.cpp
@@ -23,9 +23,9 @@
 #include <iostream>
 #include <iomanip>
 
-// y' = y (y == C*exp(t))
+// y' = y (y == C*exp(x))
 double
-f(double t, double y)
+f(double x, double y)
 {
   return y;
 }
diff --git a/tests/RK4.cpp b/tests/RK4.cpp
index 75ec46a..71a998c 100644
--- a/tests/RK4.cpp
+++ b/tests/RK4.cpp
@@ -23,9 +23,9 @@
 #include <iostream>
 #include <iomanip>
 
-// y' = y (y == C*exp(t))
+// y' = y (y == C*exp(x))
 double
-f(double t, double y)
+f(double x, double y)
 {
   return y;
 }
diff --git a/tests/RKF45.cpp b/tests/RKF45.cpp
index 59bad82..c2b98b7 100644
--- a/tests/RKF45.cpp
+++ b/tests/RKF45.cpp
@@ -23,9 +23,9 @@
 #include <iostream>
 #include <iomanip>
 
-// y' = y (y == C*exp(t))
+// y' = y (y == C*exp(x))
 double
-f(double t, double y)
+f(double x, double y)
 {
   return y;
 }
diff --git a/tests/Vector.cpp b/tests/Vector.cpp
index e3b660c..688f826 100644
--- a/tests/Vector.cpp
+++ b/tests/Vector.cpp
@@ -23,9 +23,9 @@
 #include <iostream>
 #include <iomanip>
 
-// y' = -y (y == C*exp(-t))
+// y' = -y (y == C*exp(-x))
 vZ::Vector<3>
-f(double t, vZ::Vector<3> y)
+f(double x, vZ::Vector<3> y)
 {
   return -y;
 }